<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2024 Workiva-->
<!--r:817e2281-4902-4242-9c11-8cd5bb0a6e63,g:45f0c96b-9cf9-4a71-b97f-088a59a1cfd1-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain"/>
  <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
  <link:roleRef roleURI="http://www.fnf.com/role/CONSOLIDATEDBALANCESHEETS" xlink:type="simple" xlink:href="fnf-20231231.xsd#CONSOLIDATEDBALANCESHEETS"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/CONSOLIDATEDBALANCESHEETS" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_90be131a-5c20-4b2d-b3ee-e4690e3431bf" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_7f1eadd7-365f-411e-9949-6d43dd8321d5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_90be131a-5c20-4b2d-b3ee-e4690e3431bf" xlink:to="loc_us-gaap_StatementTable_7f1eadd7-365f-411e-9949-6d43dd8321d5" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_d80057ff-4d6f-41b5-9638-0fc7cfcb3282" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_7f1eadd7-365f-411e-9949-6d43dd8321d5" xlink:to="loc_us-gaap_FinancialInstrumentAxis_d80057ff-4d6f-41b5-9638-0fc7cfcb3282" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_d80057ff-4d6f-41b5-9638-0fc7cfcb3282_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_d80057ff-4d6f-41b5-9638-0fc7cfcb3282" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_d80057ff-4d6f-41b5-9638-0fc7cfcb3282_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_cea1effd-36b4-4bd0-b2f9-e8ef0cf690f3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_d80057ff-4d6f-41b5-9638-0fc7cfcb3282" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_cea1effd-36b4-4bd0-b2f9-e8ef0cf690f3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockMember_b9e3fb9e-460d-4b34-956c-15eb01dce844" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_cea1effd-36b4-4bd0-b2f9-e8ef0cf690f3" xlink:to="loc_us-gaap_PreferredStockMember_b9e3fb9e-460d-4b34-956c-15eb01dce844" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesMember_0291e9a0-3395-409b-bce3-99dbfeb475fa" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquitySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_cea1effd-36b4-4bd0-b2f9-e8ef0cf690f3" xlink:to="loc_us-gaap_EquitySecuritiesMember_0291e9a0-3395-409b-bce3-99dbfeb475fa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract_7aa9e183-6610-4817-af61-0ed472c4e2a2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_90be131a-5c20-4b2d-b3ee-e4690e3431bf" xlink:to="loc_us-gaap_AssetsAbstract_7aa9e183-6610-4817-af61-0ed472c4e2a2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentsAbstract_14c6b46e-7e3d-472b-8ec9-45b782dda490" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_7aa9e183-6610-4817-af61-0ed472c4e2a2" xlink:to="loc_us-gaap_InvestmentsAbstract_14c6b46e-7e3d-472b-8ec9-45b782dda490" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_2da9530a-2ae2-4884-8690-0591795fa079" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentsAbstract_14c6b46e-7e3d-472b-8ec9-45b782dda490" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_2da9530a-2ae2-4884-8690-0591795fa079" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNi_36cde1a7-9343-4f9d-804e-221c15f82a34" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquitySecuritiesFvNi"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentsAbstract_14c6b46e-7e3d-472b-8ec9-45b782dda490" xlink:to="loc_us-gaap_EquitySecuritiesFvNi_36cde1a7-9343-4f9d-804e-221c15f82a34" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssets_40a9b536-3686-4b11-b254-9365ab3db7e2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentsAbstract_14c6b46e-7e3d-472b-8ec9-45b782dda490" xlink:to="loc_us-gaap_DerivativeAssets_40a9b536-3686-4b11-b254-9365ab3db7e2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss_4eff5385-5488-4351-b1d0-be231388f257" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentsAbstract_14c6b46e-7e3d-472b-8ec9-45b782dda490" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss_4eff5385-5488-4351-b1d0-be231388f257" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestments_9f5ea17f-ac22-4dc2-9895-21928115374d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentsAbstract_14c6b46e-7e3d-472b-8ec9-45b782dda490" xlink:to="loc_us-gaap_EquityMethodInvestments_9f5ea17f-ac22-4dc2-9895-21928115374d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLongTermInvestments_4af8bc67-a471-49e7-81e5-83b2b9daa91a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherLongTermInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentsAbstract_14c6b46e-7e3d-472b-8ec9-45b782dda490" xlink:to="loc_us-gaap_OtherLongTermInvestments_4af8bc67-a471-49e7-81e5-83b2b9daa91a" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherShortTermInvestments_709b7740-30de-44dd-b559-5fa38e4c53be" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherShortTermInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentsAbstract_14c6b46e-7e3d-472b-8ec9-45b782dda490" xlink:to="loc_us-gaap_OtherShortTermInvestments_709b7740-30de-44dd-b559-5fa38e4c53be" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Investments_4b0462eb-84cd-4abe-80f4-53b63dce1f6f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Investments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentsAbstract_14c6b46e-7e3d-472b-8ec9-45b782dda490" xlink:to="loc_us-gaap_Investments_4b0462eb-84cd-4abe-80f4-53b63dce1f6f" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_600f2f75-e11d-434e-91b6-6cbc4484ef68" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_7aa9e183-6610-4817-af61-0ed472c4e2a2" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_600f2f75-e11d-434e-91b6-6cbc4484ef68" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsAndNotesReceivableNet_8d7778c3-ccd6-4437-a459-4c1bca2a43a1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccountsAndNotesReceivableNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_7aa9e183-6610-4817-af61-0ed472c4e2a2" xlink:to="loc_us-gaap_AccountsAndNotesReceivableNet_8d7778c3-ccd6-4437-a459-4c1bca2a43a1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReinsuranceRecoverables_dd915224-faef-4a45-b650-890f911c77f3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ReinsuranceRecoverables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_7aa9e183-6610-4817-af61-0ed472c4e2a2" xlink:to="loc_us-gaap_ReinsuranceRecoverables_dd915224-faef-4a45-b650-890f911c77f3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_02ddf2d9-b42b-40a1-9526-aad3613333e6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_7aa9e183-6610-4817-af61-0ed472c4e2a2" xlink:to="loc_us-gaap_Goodwill_02ddf2d9-b42b-40a1-9526-aad3613333e6" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssets_348769d9-2d68-458d-a19c-ea32c03ba8d0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PrepaidExpenseAndOtherAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_7aa9e183-6610-4817-af61-0ed472c4e2a2" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssets_348769d9-2d68-458d-a19c-ea32c03ba8d0" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketRiskBenefitAssetAmount_697bccfc-d156-485d-a5f5-313aa220aa52" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MarketRiskBenefitAssetAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_7aa9e183-6610-4817-af61-0ed472c4e2a2" xlink:to="loc_us-gaap_MarketRiskBenefitAssetAmount_697bccfc-d156-485d-a5f5-313aa220aa52" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_1b322b79-c521-47ed-81b6-6ef251137f16" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_7aa9e183-6610-4817-af61-0ed472c4e2a2" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_1b322b79-c521-47ed-81b6-6ef251137f16" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_IntangibleAssetsNetExcludingGoodwillandTitlePlants_59f8b9fb-4f6c-4c64-a6b1-d9aaccecae03" xlink:href="fnf-20231231.xsd#fnf_IntangibleAssetsNetExcludingGoodwillandTitlePlants"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_7aa9e183-6610-4817-af61-0ed472c4e2a2" xlink:to="loc_fnf_IntangibleAssetsNetExcludingGoodwillandTitlePlants_59f8b9fb-4f6c-4c64-a6b1-d9aaccecae03" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_IntangibleAssetsTitlePlants_09b227d5-1461-4dea-85e1-d0ad70f74a14" xlink:href="fnf-20231231.xsd#fnf_IntangibleAssetsTitlePlants"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_7aa9e183-6610-4817-af61-0ed472c4e2a2" xlink:to="loc_fnf_IntangibleAssetsTitlePlants_09b227d5-1461-4dea-85e1-d0ad70f74a14" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_5475d444-82f8-48eb-a4b5-099b9909a665" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_7aa9e183-6610-4817-af61-0ed472c4e2a2" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_5475d444-82f8-48eb-a4b5-099b9909a665" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_eda04351-2e0d-454c-9d24-9d668e967671" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_7aa9e183-6610-4817-af61-0ed472c4e2a2" xlink:to="loc_us-gaap_Assets_eda04351-2e0d-454c-9d24-9d668e967671" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_1d634bf4-be92-41c5-9280-f4067cfb7a3b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_90be131a-5c20-4b2d-b3ee-e4690e3431bf" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_1d634bf4-be92-41c5-9280-f4067cfb7a3b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAbstract_fbf41b53-e2e4-4209-be3b-9e248e000f5b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_1d634bf4-be92-41c5-9280-f4067cfb7a3b" xlink:to="loc_us-gaap_LiabilitiesAbstract_fbf41b53-e2e4-4209-be3b-9e248e000f5b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PolicyholderFunds_b2b608bd-ce5a-4185-b2d7-3ec278fd3dff" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PolicyholderFunds"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_fbf41b53-e2e4-4209-be3b-9e248e000f5b" xlink:to="loc_us-gaap_PolicyholderFunds_b2b608bd-ce5a-4185-b2d7-3ec278fd3dff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefits_2e15d3df-fcc1-4205-86cc-3f82d3c6edb6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_fbf41b53-e2e4-4209-be3b-9e248e000f5b" xlink:to="loc_us-gaap_LiabilityForFuturePolicyBenefits_2e15d3df-fcc1-4205-86cc-3f82d3c6edb6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent_83f08e51-352c-4310-9b03-f10fbddb763e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_fbf41b53-e2e4-4209-be3b-9e248e000f5b" xlink:to="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent_83f08e51-352c-4310-9b03-f10fbddb763e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketRiskBenefitLiabilityAmount_397db803-6b1d-4855-8d99-8c28ccb1c573" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MarketRiskBenefitLiabilityAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_fbf41b53-e2e4-4209-be3b-9e248e000f5b" xlink:to="loc_us-gaap_MarketRiskBenefitLiabilityAmount_397db803-6b1d-4855-8d99-8c28ccb1c573" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_70ff2f91-5512-4c54-878c-8fbb4131375f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_fbf41b53-e2e4-4209-be3b-9e248e000f5b" xlink:to="loc_us-gaap_LongTermDebt_70ff2f91-5512-4c54-878c-8fbb4131375f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet_4d91e7c0-90a1-46d6-8189-c4eb3f188291" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_fbf41b53-e2e4-4209-be3b-9e248e000f5b" xlink:to="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet_4d91e7c0-90a1-46d6-8189-c4eb3f188291" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FundsHeldUnderReinsuranceAgreementsLiability_9b9eb01d-06af-4583-9aef-d32cac4e292e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FundsHeldUnderReinsuranceAgreementsLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_fbf41b53-e2e4-4209-be3b-9e248e000f5b" xlink:to="loc_us-gaap_FundsHeldUnderReinsuranceAgreementsLiability_9b9eb01d-06af-4583-9aef-d32cac4e292e" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_ContractWithCustomerLiabilityCustomerDeposits_1656e26a-4ec0-4eda-949e-6f07d52b9589" xlink:href="fnf-20231231.xsd#fnf_ContractWithCustomerLiabilityCustomerDeposits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_fbf41b53-e2e4-4209-be3b-9e248e000f5b" xlink:to="loc_fnf_ContractWithCustomerLiabilityCustomerDeposits_1656e26a-4ec0-4eda-949e-6f07d52b9589" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiability_ce19558e-7f35-46bb-afc5-f74cf6bbac6a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingLeaseLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_fbf41b53-e2e4-4209-be3b-9e248e000f5b" xlink:to="loc_us-gaap_OperatingLeaseLiability_ce19558e-7f35-46bb-afc5-f74cf6bbac6a" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxesPayableCurrentAndNoncurrent_617e6ce4-3032-4dac-9087-4d421c061ff5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TaxesPayableCurrentAndNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_fbf41b53-e2e4-4209-be3b-9e248e000f5b" xlink:to="loc_us-gaap_TaxesPayableCurrentAndNoncurrent_617e6ce4-3032-4dac-9087-4d421c061ff5" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_62ee36f7-9956-4d72-b494-311a8514c371" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredIncomeTaxLiabilitiesNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_fbf41b53-e2e4-4209-be3b-9e248e000f5b" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_62ee36f7-9956-4d72-b494-311a8514c371" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_7cb9591c-d7b5-4ec0-8606-8d5dab0aadfc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Liabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_fbf41b53-e2e4-4209-be3b-9e248e000f5b" xlink:to="loc_us-gaap_Liabilities_7cb9591c-d7b5-4ec0-8606-8d5dab0aadfc" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityAbstract_5acaf6e0-ac81-4758-8227-a503880649cb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockholdersEquityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_1d634bf4-be92-41c5-9280-f4067cfb7a3b" xlink:to="loc_us-gaap_StockholdersEquityAbstract_5acaf6e0-ac81-4758-8227-a503880649cb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_a926b53f-000f-4779-bac0-e0ef10cee6cb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommonStockValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_5acaf6e0-ac81-4758-8227-a503880649cb" xlink:to="loc_us-gaap_CommonStockValue_a926b53f-000f-4779-bac0-e0ef10cee6cb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockValue_fe14b8b7-4476-416b-929f-7d6916b24075" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PreferredStockValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_5acaf6e0-ac81-4758-8227-a503880649cb" xlink:to="loc_us-gaap_PreferredStockValue_fe14b8b7-4476-416b-929f-7d6916b24075" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalCommonStock_8b2edf3d-aec0-4ff5-a5ba-961e21ba25c0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AdditionalPaidInCapitalCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_5acaf6e0-ac81-4758-8227-a503880649cb" xlink:to="loc_us-gaap_AdditionalPaidInCapitalCommonStock_8b2edf3d-aec0-4ff5-a5ba-961e21ba25c0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_28c28ba4-a8ee-47cc-ad83-01ec7d55dec1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_5acaf6e0-ac81-4758-8227-a503880649cb" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_28c28ba4-a8ee-47cc-ad83-01ec7d55dec1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_0fe25a9f-6120-4e36-a1aa-5bd04cd88077" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_5acaf6e0-ac81-4758-8227-a503880649cb" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_0fe25a9f-6120-4e36-a1aa-5bd04cd88077" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValue_c722ed62-c2ef-4e88-8af2-44899b885ec0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TreasuryStockValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_5acaf6e0-ac81-4758-8227-a503880649cb" xlink:to="loc_us-gaap_TreasuryStockValue_c722ed62-c2ef-4e88-8af2-44899b885ec0" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_f872b24a-e23d-4ca9-85b3-ad2173b64a3b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_5acaf6e0-ac81-4758-8227-a503880649cb" xlink:to="loc_us-gaap_StockholdersEquity_f872b24a-e23d-4ca9-85b3-ad2173b64a3b" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterest_c70cf5ec-da81-4f61-a7ef-e6aee0c38adf" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MinorityInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_5acaf6e0-ac81-4758-8227-a503880649cb" xlink:to="loc_us-gaap_MinorityInterest_c70cf5ec-da81-4f61-a7ef-e6aee0c38adf" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_7dcf6224-d5aa-49c9-a087-d827f55c434b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StockholdersEquityAbstract_5acaf6e0-ac81-4758-8227-a503880649cb" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_7dcf6224-d5aa-49c9-a087-d827f55c434b" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_355e42a3-ffba-4deb-be28-73804311215b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_1d634bf4-be92-41c5-9280-f4067cfb7a3b" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquity_355e42a3-ffba-4deb-be28-73804311215b" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/CONSOLIDATEDSTATEMENTSOFEQUITY" xlink:type="simple" xlink:href="fnf-20231231.xsd#CONSOLIDATEDSTATEMENTSOFEQUITY"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/CONSOLIDATEDSTATEMENTSOFEQUITY" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_1e44ee85-584b-4bc7-854c-d3b6ea54b78f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementTable_a4dc0599-7b87-4724-aca5-cd31e20f5b3d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_1e44ee85-584b-4bc7-854c-d3b6ea54b78f" xlink:to="loc_us-gaap_StatementTable_a4dc0599-7b87-4724-aca5-cd31e20f5b3d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_2d93b5cb-d030-43b6-817c-0c71b12b3089" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_a4dc0599-7b87-4724-aca5-cd31e20f5b3d" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_2d93b5cb-d030-43b6-817c-0c71b12b3089" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_2d93b5cb-d030-43b6-817c-0c71b12b3089_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_2d93b5cb-d030-43b6-817c-0c71b12b3089" xlink:to="loc_us-gaap_EquityComponentDomain_2d93b5cb-d030-43b6-817c-0c71b12b3089_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_42e0a944-c394-4c9a-8bad-66a0ab0b296e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_2d93b5cb-d030-43b6-817c-0c71b12b3089" xlink:to="loc_us-gaap_EquityComponentDomain_42e0a944-c394-4c9a-8bad-66a0ab0b296e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_9b0168af-9050-4ec6-97b2-77cd797a888f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_42e0a944-c394-4c9a-8bad-66a0ab0b296e" xlink:to="loc_us-gaap_CommonStockMember_9b0168af-9050-4ec6-97b2-77cd797a888f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalMember_7866a249-bf27-4d01-adc1-5dd916692b9c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AdditionalPaidInCapitalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_42e0a944-c394-4c9a-8bad-66a0ab0b296e" xlink:to="loc_us-gaap_AdditionalPaidInCapitalMember_7866a249-bf27-4d01-adc1-5dd916692b9c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_5896601f-91a6-4155-9939-fa4d8b0f8626" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_42e0a944-c394-4c9a-8bad-66a0ab0b296e" xlink:to="loc_us-gaap_RetainedEarningsMember_5896601f-91a6-4155-9939-fa4d8b0f8626" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_a721ce3e-6e6d-4a0f-b162-30353d5f71b0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_42e0a944-c394-4c9a-8bad-66a0ab0b296e" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_a721ce3e-6e6d-4a0f-b162-30353d5f71b0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonMember_e2d735ef-7111-4383-95d8-99ef87c3da64" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TreasuryStockCommonMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_42e0a944-c394-4c9a-8bad-66a0ab0b296e" xlink:to="loc_us-gaap_TreasuryStockCommonMember_e2d735ef-7111-4383-95d8-99ef87c3da64" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestMember_295a0a11-3c22-49ad-8dbf-3e1f89c7ad52" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NoncontrollingInterestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_42e0a944-c394-4c9a-8bad-66a0ab0b296e" xlink:to="loc_us-gaap_NoncontrollingInterestMember_295a0a11-3c22-49ad-8dbf-3e1f89c7ad52" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_19154bfc-b3ac-44c7-8acf-a179793c8573" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatementTable_a4dc0599-7b87-4724-aca5-cd31e20f5b3d" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_19154bfc-b3ac-44c7-8acf-a179793c8573" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_19154bfc-b3ac-44c7-8acf-a179793c8573_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_19154bfc-b3ac-44c7-8acf-a179793c8573" xlink:to="loc_us-gaap_SegmentDomain_19154bfc-b3ac-44c7-8acf-a179793c8573_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_0b5f6db1-1d94-48a0-aeb8-b493f3812ad1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_19154bfc-b3ac-44c7-8acf-a179793c8573" xlink:to="loc_us-gaap_SegmentDomain_0b5f6db1-1d94-48a0-aeb8-b493f3812ad1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FGMember_9b168e37-9a93-480b-a543-c5c8002494aa" xlink:href="fnf-20231231.xsd#fnf_FGMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_0b5f6db1-1d94-48a0-aeb8-b493f3812ad1" xlink:to="loc_fnf_FGMember_9b168e37-9a93-480b-a543-c5c8002494aa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_719399dd-8aff-48e4-851b-4340c834a7f9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInStockholdersEquityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_1e44ee85-584b-4bc7-854c-d3b6ea54b78f" xlink:to="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_719399dd-8aff-48e4-851b-4340c834a7f9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_9af1d085-2e38-4c3d-a567-c467fa15bb0c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_719399dd-8aff-48e4-851b-4340c834a7f9" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_9af1d085-2e38-4c3d-a567-c467fa15bb0c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesIssued_a14748bc-4325-4bd4-98d4-f35256d0718b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_719399dd-8aff-48e4-851b-4340c834a7f9" xlink:to="loc_us-gaap_SharesIssued_a14748bc-4325-4bd4-98d4-f35256d0718b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonShares_be8a0693-dd14-4342-a307-38acc14d2eaa" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TreasuryStockCommonShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_719399dd-8aff-48e4-851b-4340c834a7f9" xlink:to="loc_us-gaap_TreasuryStockCommonShares_be8a0693-dd14-4342-a307-38acc14d2eaa" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_1f7184f4-783d-40bc-8a0e-68d921fb1703" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_719399dd-8aff-48e4-851b-4340c834a7f9" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_1f7184f4-783d-40bc-8a0e-68d921fb1703" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_5f2f1c5f-841e-4bee-afee-b38e0f2ee2c8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_719399dd-8aff-48e4-851b-4340c834a7f9" xlink:to="loc_us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_5f2f1c5f-841e-4bee-afee-b38e0f2ee2c8" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncontrollingInterestIncreaseFromBusinessCombination_c22b3c0f-d593-41ca-a92e-d5a5c17c6fd9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NoncontrollingInterestIncreaseFromBusinessCombination"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_719399dd-8aff-48e4-851b-4340c834a7f9" xlink:to="loc_us-gaap_NoncontrollingInterestIncreaseFromBusinessCombination_c22b3c0f-d593-41ca-a92e-d5a5c17c6fd9" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_20ed3001-b1b8-4f73-b756-9c1f9d8040aa" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TreasuryStockValueAcquiredCostMethod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_719399dd-8aff-48e4-851b-4340c834a7f9" xlink:to="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_20ed3001-b1b8-4f73-b756-9c1f9d8040aa" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockSharesAcquired_92d423d6-0249-4c08-9b08-4d0659f978fd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TreasuryStockSharesAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_719399dd-8aff-48e4-851b-4340c834a7f9" xlink:to="loc_us-gaap_TreasuryStockSharesAcquired_92d423d6-0249-4c08-9b08-4d0659f978fd" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross_d4281050-81cf-44d8-9777-3b5b8c7a0504" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_719399dd-8aff-48e4-851b-4340c834a7f9" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesRestrictedStockAwardGross_d4281050-81cf-44d8-9777-3b5b8c7a0504" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestDecreaseFromRedemptions_42df1373-ede2-4795-983f-b4a1b5d3e090" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MinorityInterestDecreaseFromRedemptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_719399dd-8aff-48e4-851b-4340c834a7f9" xlink:to="loc_us-gaap_MinorityInterestDecreaseFromRedemptions_42df1373-ede2-4795-983f-b4a1b5d3e090" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_cd818a70-a65d-4d8b-b4e3-942b0bf1b302" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_719399dd-8aff-48e4-851b-4340c834a7f9" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_cd818a70-a65d-4d8b-b4e3-942b0bf1b302" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OciEquityMethodInvestmentAfterTax_7fb7982d-4840-49e1-940f-aa5e818333d4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OciEquityMethodInvestmentAfterTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_719399dd-8aff-48e4-851b-4340c834a7f9" xlink:to="loc_us-gaap_OciEquityMethodInvestmentAfterTax_7fb7982d-4840-49e1-940f-aa5e818333d4" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_394f85c6-9e85-49d6-9d53-c298912c16bc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_719399dd-8aff-48e4-851b-4340c834a7f9" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_394f85c6-9e85-49d6-9d53-c298912c16bc" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_1a02a336-5483-44c7-a92c-08bf590b1b94" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_719399dd-8aff-48e4-851b-4340c834a7f9" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_1a02a336-5483-44c7-a92c-08bf590b1b94" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_b831b751-02d0-4436-b5a6-ae80bb4a6569" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_719399dd-8aff-48e4-851b-4340c834a7f9" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax_b831b751-02d0-4436-b5a6-ae80bb4a6569" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_2798111c-48cd-4790-bd94-69132ec8a333" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_719399dd-8aff-48e4-851b-4340c834a7f9" xlink:to="loc_us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue_2798111c-48cd-4790-bd94-69132ec8a333" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCommonStockCash_50336ca8-71c1-4391-8bb7-8726afa62e95" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DividendsCommonStockCash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_719399dd-8aff-48e4-851b-4340c834a7f9" xlink:to="loc_us-gaap_DividendsCommonStockCash_50336ca8-71c1-4391-8bb7-8726afa62e95" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_5d5bbf67-c259-4503-bd19-9987719ec2f6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_719399dd-8aff-48e4-851b-4340c834a7f9" xlink:to="loc_us-gaap_AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation_5d5bbf67-c259-4503-bd19-9987719ec2f6" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_05ebd3b8-1bff-4e2d-9f71-ffbc2f18a6d3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_719399dd-8aff-48e4-851b-4340c834a7f9" xlink:to="loc_us-gaap_SharesPaidForTaxWithholdingForShareBasedCompensation_05ebd3b8-1bff-4e2d-9f71-ffbc2f18a6d3" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodAfterTax_4b6bfd6b-d750-47b5-8d0e-31429ba0941f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodAfterTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_719399dd-8aff-48e4-851b-4340c834a7f9" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodAfterTax_4b6bfd6b-d750-47b5-8d0e-31429ba0941f" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_OtherComprehensiveIncomeLossTaxPortionAttributableToNoncontrollingInterestSpinoff_dbf5f002-f1fd-4982-a37d-c17481b253a2" xlink:href="fnf-20231231.xsd#fnf_OtherComprehensiveIncomeLossTaxPortionAttributableToNoncontrollingInterestSpinoff"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_719399dd-8aff-48e4-851b-4340c834a7f9" xlink:to="loc_fnf_OtherComprehensiveIncomeLossTaxPortionAttributableToNoncontrollingInterestSpinoff_dbf5f002-f1fd-4982-a37d-c17481b253a2" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OciLiabilityForFuturePolicyBenefitGainLossAfterReclassificationAdjustmentAndTax_b0a9e9ca-ebc4-4cfd-9af1-98907ce857b9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OciLiabilityForFuturePolicyBenefitGainLossAfterReclassificationAdjustmentAndTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_719399dd-8aff-48e4-851b-4340c834a7f9" xlink:to="loc_us-gaap_OciLiabilityForFuturePolicyBenefitGainLossAfterReclassificationAdjustmentAndTax_b0a9e9ca-ebc4-4cfd-9af1-98907ce857b9" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OciMarketRiskBenefitInstrumentSpecificCreditRiskGainLossAfterAdjustmentsAndTax_023f2da4-5dd4-4f9f-b37f-6f1054980876" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OciMarketRiskBenefitInstrumentSpecificCreditRiskGainLossAfterAdjustmentsAndTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_719399dd-8aff-48e4-851b-4340c834a7f9" xlink:to="loc_us-gaap_OciMarketRiskBenefitInstrumentSpecificCreditRiskGainLossAfterAdjustmentsAndTax_023f2da4-5dd4-4f9f-b37f-6f1054980876" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityNoteSpinoffTransaction_1602c356-8480-4102-a5c4-811c141d3364" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockholdersEquityNoteSpinoffTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_719399dd-8aff-48e4-851b-4340c834a7f9" xlink:to="loc_us-gaap_StockholdersEquityNoteSpinoffTransaction_1602c356-8480-4102-a5c4-811c141d3364" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_559a933f-e2b3-4b0a-8d24-7a20683c2ce1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_719399dd-8aff-48e4-851b-4340c834a7f9" xlink:to="loc_us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders_559a933f-e2b3-4b0a-8d24-7a20683c2ce1" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProfitLoss_09720360-ff22-467d-804f-a4f4b4e5855d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProfitLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncreaseDecreaseInStockholdersEquityRollForward_719399dd-8aff-48e4-851b-4340c834a7f9" xlink:to="loc_us-gaap_ProfitLoss_09720360-ff22-467d-804f-a4f4b4e5855d" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharesIssued_528333fc-c34c-44d7-9f94-a122e066b6c8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SharesIssued"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_4ad5b478-40db-43b7-affa-7a2deddd227f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonShares_41407459-a758-49b7-9224-c14facface91" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TreasuryStockCommonShares"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/BusinessandSummaryofSignificantAccountingPoliciesRecentDevelopmentsDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#BusinessandSummaryofSignificantAccountingPoliciesRecentDevelopmentsDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/BusinessandSummaryofSignificantAccountingPoliciesRecentDevelopmentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_2193fc1f-6266-4b21-89c9-1b5cf6156940" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_734c9789-27bc-4077-bd60-7edbbd46ee50" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_2193fc1f-6266-4b21-89c9-1b5cf6156940" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_734c9789-27bc-4077-bd60-7edbbd46ee50" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_9457ebb6-89d8-407e-a047-0ffc923c76cd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_734c9789-27bc-4077-bd60-7edbbd46ee50" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_9457ebb6-89d8-407e-a047-0ffc923c76cd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_9457ebb6-89d8-407e-a047-0ffc923c76cd_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_9457ebb6-89d8-407e-a047-0ffc923c76cd" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_9457ebb6-89d8-407e-a047-0ffc923c76cd_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_690a34e2-9ee9-4092-848e-6ec7f09b3e2b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_9457ebb6-89d8-407e-a047-0ffc923c76cd" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_690a34e2-9ee9-4092-848e-6ec7f09b3e2b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_472235e9-9085-4ad9-846f-9b781def5ad9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_690a34e2-9ee9-4092-848e-6ec7f09b3e2b" xlink:to="loc_us-gaap_SubsequentEventMember_472235e9-9085-4ad9-846f-9b781def5ad9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_3010fe22-0be1-425d-acbf-cc325e9c0d3b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_734c9789-27bc-4077-bd60-7edbbd46ee50" xlink:to="loc_us-gaap_CreditFacilityAxis_3010fe22-0be1-425d-acbf-cc325e9c0d3b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_3010fe22-0be1-425d-acbf-cc325e9c0d3b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_3010fe22-0be1-425d-acbf-cc325e9c0d3b" xlink:to="loc_us-gaap_CreditFacilityDomain_3010fe22-0be1-425d-acbf-cc325e9c0d3b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_0b5939d5-c59f-40e1-b48c-82b037616dfb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_3010fe22-0be1-425d-acbf-cc325e9c0d3b" xlink:to="loc_us-gaap_CreditFacilityDomain_0b5939d5-c59f-40e1-b48c-82b037616dfb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_78e60e24-f6fe-4249-907a-cd73df3b3c6b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_0b5939d5-c59f-40e1-b48c-82b037616dfb" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_78e60e24-f6fe-4249-907a-cd73df3b3c6b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_555f265e-7afe-474e-a707-4e0534cba4b6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_734c9789-27bc-4077-bd60-7edbbd46ee50" xlink:to="loc_us-gaap_DebtInstrumentAxis_555f265e-7afe-474e-a707-4e0534cba4b6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_555f265e-7afe-474e-a707-4e0534cba4b6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_555f265e-7afe-474e-a707-4e0534cba4b6" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_555f265e-7afe-474e-a707-4e0534cba4b6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_83fe77c5-df1d-4445-8619-550837d6e71c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_555f265e-7afe-474e-a707-4e0534cba4b6" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_83fe77c5-df1d-4445-8619-550837d6e71c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_RevolvingCreditFacilityDueApril2022Member_bff28be6-6265-4ca6-a177-c9e79072515b" xlink:href="fnf-20231231.xsd#fnf_RevolvingCreditFacilityDueApril2022Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_83fe77c5-df1d-4445-8619-550837d6e71c" xlink:to="loc_fnf_RevolvingCreditFacilityDueApril2022Member_bff28be6-6265-4ca6-a177-c9e79072515b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FGCreditAgreementMember_3e566bba-a288-4c37-8449-0621d92b2bb6" xlink:href="fnf-20231231.xsd#fnf_FGCreditAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_83fe77c5-df1d-4445-8619-550837d6e71c" xlink:to="loc_fnf_FGCreditAgreementMember_3e566bba-a288-4c37-8449-0621d92b2bb6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_A795SeniorNotesDue2053Member_f065f4ba-8d6b-43c2-b27a-aae86119e025" xlink:href="fnf-20231231.xsd#fnf_A795SeniorNotesDue2053Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_83fe77c5-df1d-4445-8619-550837d6e71c" xlink:to="loc_fnf_A795SeniorNotesDue2053Member_f065f4ba-8d6b-43c2-b27a-aae86119e025" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_A740FGSeniorNotesMember_46529dfc-a8f6-44a3-be71-dd5af4c73ff8" xlink:href="fnf-20231231.xsd#fnf_A740FGSeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_83fe77c5-df1d-4445-8619-550837d6e71c" xlink:to="loc_fnf_A740FGSeniorNotesMember_46529dfc-a8f6-44a3-be71-dd5af4c73ff8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_91a34a3b-1893-4e4e-b9dc-01d0c5b7fee1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_734c9789-27bc-4077-bd60-7edbbd46ee50" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_91a34a3b-1893-4e4e-b9dc-01d0c5b7fee1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_91a34a3b-1893-4e4e-b9dc-01d0c5b7fee1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_91a34a3b-1893-4e4e-b9dc-01d0c5b7fee1" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_91a34a3b-1893-4e4e-b9dc-01d0c5b7fee1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_bea5f954-6790-48fc-b46f-057c8eb2d6b0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_91a34a3b-1893-4e4e-b9dc-01d0c5b7fee1" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_bea5f954-6790-48fc-b46f-057c8eb2d6b0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_934a205c-8cee-49f1-893d-aa3515882a6d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_bea5f954-6790-48fc-b46f-057c8eb2d6b0" xlink:to="loc_us-gaap_LineOfCreditMember_934a205c-8cee-49f1-893d-aa3515882a6d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_dbe3d741-e9e7-4df2-b4af-8484f25898ef" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_bea5f954-6790-48fc-b46f-057c8eb2d6b0" xlink:to="loc_us-gaap_SeniorNotesMember_dbe3d741-e9e7-4df2-b4af-8484f25898ef" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_1b5a0087-ab66-42ec-ae08-6b4568e693c7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_734c9789-27bc-4077-bd60-7edbbd46ee50" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_1b5a0087-ab66-42ec-ae08-6b4568e693c7" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_1b5a0087-ab66-42ec-ae08-6b4568e693c7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_1b5a0087-ab66-42ec-ae08-6b4568e693c7" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_1b5a0087-ab66-42ec-ae08-6b4568e693c7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_ae2c59a0-c4c3-4c6b-85ab-7c97e7d9cf6f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_1b5a0087-ab66-42ec-ae08-6b4568e693c7" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_ae2c59a0-c4c3-4c6b-85ab-7c97e7d9cf6f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_RoarJointVentureLLCMember_e8a43a68-9417-4280-9d2e-268646178c8e" xlink:href="fnf-20231231.xsd#fnf_RoarJointVentureLLCMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_ae2c59a0-c4c3-4c6b-85ab-7c97e7d9cf6f" xlink:to="loc_fnf_RoarJointVentureLLCMember_e8a43a68-9417-4280-9d2e-268646178c8e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_TitlePointMember_498e440b-38d7-46d8-854f-c34bcea091de" xlink:href="fnf-20231231.xsd#fnf_TitlePointMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_ae2c59a0-c4c3-4c6b-85ab-7c97e7d9cf6f" xlink:to="loc_fnf_TitlePointMember_498e440b-38d7-46d8-854f-c34bcea091de" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_4dd54e52-9521-46f4-894b-4ccf0ec84f0b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_734c9789-27bc-4077-bd60-7edbbd46ee50" xlink:to="loc_us-gaap_StatementClassOfStockAxis_4dd54e52-9521-46f4-894b-4ccf0ec84f0b" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_4dd54e52-9521-46f4-894b-4ccf0ec84f0b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_4dd54e52-9521-46f4-894b-4ccf0ec84f0b" xlink:to="loc_us-gaap_ClassOfStockDomain_4dd54e52-9521-46f4-894b-4ccf0ec84f0b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_90cdd759-5aa9-4484-8d97-3794f78dad4f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_4dd54e52-9521-46f4-894b-4ccf0ec84f0b" xlink:to="loc_us-gaap_ClassOfStockDomain_90cdd759-5aa9-4484-8d97-3794f78dad4f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_A6875SeriesAMandatoryConvertiblePreferredStockMember_f381d497-daca-4821-8a67-31f68c94ff6d" xlink:href="fnf-20231231.xsd#fnf_A6875SeriesAMandatoryConvertiblePreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_90cdd759-5aa9-4484-8d97-3794f78dad4f" xlink:to="loc_fnf_A6875SeriesAMandatoryConvertiblePreferredStockMember_f381d497-daca-4821-8a67-31f68c94ff6d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_add65b4d-b1e9-45af-ae1f-051e97aa456f" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_734c9789-27bc-4077-bd60-7edbbd46ee50" xlink:to="loc_srt_RangeAxis_add65b4d-b1e9-45af-ae1f-051e97aa456f" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_add65b4d-b1e9-45af-ae1f-051e97aa456f_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_add65b4d-b1e9-45af-ae1f-051e97aa456f" xlink:to="loc_srt_RangeMember_add65b4d-b1e9-45af-ae1f-051e97aa456f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_c4b7a984-cb11-41a7-a208-7781c7a4ce5d" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_add65b4d-b1e9-45af-ae1f-051e97aa456f" xlink:to="loc_srt_RangeMember_c4b7a984-cb11-41a7-a208-7781c7a4ce5d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_a0da586d-f8eb-4486-adb9-f586af4183f1" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_c4b7a984-cb11-41a7-a208-7781c7a4ce5d" xlink:to="loc_srt_MaximumMember_a0da586d-f8eb-4486-adb9-f586af4183f1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_bd17941e-7c90-47ca-a34d-947436f653d4" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_c4b7a984-cb11-41a7-a208-7781c7a4ce5d" xlink:to="loc_srt_MinimumMember_bd17941e-7c90-47ca-a34d-947436f653d4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_71070c6d-f52f-47bc-8da9-de06117fd42c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_734c9789-27bc-4077-bd60-7edbbd46ee50" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_71070c6d-f52f-47bc-8da9-de06117fd42c" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_71070c6d-f52f-47bc-8da9-de06117fd42c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_71070c6d-f52f-47bc-8da9-de06117fd42c" xlink:to="loc_us-gaap_RelatedPartyDomain_71070c6d-f52f-47bc-8da9-de06117fd42c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_af5b0ee1-6fc7-4b64-8d48-6f06c3d1b5ed" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_71070c6d-f52f-47bc-8da9-de06117fd42c" xlink:to="loc_us-gaap_RelatedPartyDomain_af5b0ee1-6fc7-4b64-8d48-6f06c3d1b5ed" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_AffiliatedEntityMember_295378b5-3dce-4622-a8e9-6c2b83e7de52" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_AffiliatedEntityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_af5b0ee1-6fc7-4b64-8d48-6f06c3d1b5ed" xlink:to="loc_srt_AffiliatedEntityMember_295378b5-3dce-4622-a8e9-6c2b83e7de52" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_7ff1432e-d65a-41c9-a28d-b0701cbc1f43" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_734c9789-27bc-4077-bd60-7edbbd46ee50" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_7ff1432e-d65a-41c9-a28d-b0701cbc1f43" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_7ff1432e-d65a-41c9-a28d-b0701cbc1f43_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_7ff1432e-d65a-41c9-a28d-b0701cbc1f43" xlink:to="loc_us-gaap_SegmentDomain_7ff1432e-d65a-41c9-a28d-b0701cbc1f43_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_a0168d29-bbed-462d-811e-df37d7d872ec" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_7ff1432e-d65a-41c9-a28d-b0701cbc1f43" xlink:to="loc_us-gaap_SegmentDomain_a0168d29-bbed-462d-811e-df37d7d872ec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FGMember_d2d362a6-6c99-4e9b-9ce0-3dfd376d0674" xlink:href="fnf-20231231.xsd#fnf_FGMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_a0168d29-bbed-462d-811e-df37d7d872ec" xlink:to="loc_fnf_FGMember_d2d362a6-6c99-4e9b-9ce0-3dfd376d0674" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_fe328bbb-f8f4-438b-a8c0-0755051a90d9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_2193fc1f-6266-4b21-89c9-1b5cf6156940" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_fe328bbb-f8f4-438b-a8c0-0755051a90d9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_2cd75469-8bcb-4050-84c0-62eedca5be14" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_2193fc1f-6266-4b21-89c9-1b5cf6156940" xlink:to="loc_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_2cd75469-8bcb-4050-84c0-62eedca5be14" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesGross_20042853-06c7-4c63-8623-fb214965f777" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsToAcquireBusinessesGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_2193fc1f-6266-4b21-89c9-1b5cf6156940" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesGross_20042853-06c7-4c63-8623-fb214965f777" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_a512c2ab-5801-4905-89a4-924285998461" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationContingentConsiderationLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_2193fc1f-6266-4b21-89c9-1b5cf6156940" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_a512c2ab-5801-4905-89a4-924285998461" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_BusinessCombinationContingentConsiderationLiabilityPaymentPeriod_f9e14510-6ff6-49bd-909e-70f6012e2a32" xlink:href="fnf-20231231.xsd#fnf_BusinessCombinationContingentConsiderationLiabilityPaymentPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_2193fc1f-6266-4b21-89c9-1b5cf6156940" xlink:to="loc_fnf_BusinessCombinationContingentConsiderationLiabilityPaymentPeriod_f9e14510-6ff6-49bd-909e-70f6012e2a32" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_PaymentsToPurchasePreferredStockOfSubsidiary_cbc89c64-b85b-4f0b-8248-4ec8b19956d2" xlink:href="fnf-20231231.xsd#fnf_PaymentsToPurchasePreferredStockOfSubsidiary"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_2193fc1f-6266-4b21-89c9-1b5cf6156940" xlink:to="loc_fnf_PaymentsToPurchasePreferredStockOfSubsidiary_cbc89c64-b85b-4f0b-8248-4ec8b19956d2" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_PurchaseOfStockNumberOfSharesIssuedInTransaction_c1ec1457-5bad-484d-8070-7d9a4cf6aa8d" xlink:href="fnf-20231231.xsd#fnf_PurchaseOfStockNumberOfSharesIssuedInTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_2193fc1f-6266-4b21-89c9-1b5cf6156940" xlink:to="loc_fnf_PurchaseOfStockNumberOfSharesIssuedInTransaction_c1ec1457-5bad-484d-8070-7d9a4cf6aa8d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockDividendRatePercentage_c8376ea9-fa06-4017-9292-67daa8a1e4fe" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PreferredStockDividendRatePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_2193fc1f-6266-4b21-89c9-1b5cf6156940" xlink:to="loc_us-gaap_PreferredStockDividendRatePercentage_c8376ea9-fa06-4017-9292-67daa8a1e4fe" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockParOrStatedValuePerShare_6015afd1-1a4e-407f-9fc7-bfa07d2bae3a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PreferredStockParOrStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_2193fc1f-6266-4b21-89c9-1b5cf6156940" xlink:to="loc_us-gaap_PreferredStockParOrStatedValuePerShare_6015afd1-1a4e-407f-9fc7-bfa07d2bae3a" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockLiquidationPreference_7ead71ea-8326-4922-b751-fc181bd4bc1f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PreferredStockLiquidationPreference"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_2193fc1f-6266-4b21-89c9-1b5cf6156940" xlink:to="loc_us-gaap_PreferredStockLiquidationPreference_7ead71ea-8326-4922-b751-fc181bd4bc1f" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockConvertibleConversionRatio_d63dd2f0-02d1-4ba4-aeaa-f731558db137" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PreferredStockConvertibleConversionRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_2193fc1f-6266-4b21-89c9-1b5cf6156940" xlink:to="loc_us-gaap_PreferredStockConvertibleConversionRatio_d63dd2f0-02d1-4ba4-aeaa-f731558db137" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_076db80d-c266-408d-85fa-7fb599b05391" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_2193fc1f-6266-4b21-89c9-1b5cf6156940" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_076db80d-c266-408d-85fa-7fb599b05391" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_fa6bf7e5-ea38-4aad-820c-6e46e2e42102" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_2193fc1f-6266-4b21-89c9-1b5cf6156940" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_fa6bf7e5-ea38-4aad-820c-6e46e2e42102" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_LossContingencyNumberOfPotentiallyImpactedCustomers_ee4b9f76-c4c3-4659-97ad-d9e195d5e4eb" xlink:href="fnf-20231231.xsd#fnf_LossContingencyNumberOfPotentiallyImpactedCustomers"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_2193fc1f-6266-4b21-89c9-1b5cf6156940" xlink:to="loc_fnf_LossContingencyNumberOfPotentiallyImpactedCustomers_ee4b9f76-c4c3-4659-97ad-d9e195d5e4eb" xlink:type="arc" order="13"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/BusinessandSummaryofSignificantAccountingPoliciesTradeandNotesReceivableDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#BusinessandSummaryofSignificantAccountingPoliciesTradeandNotesReceivableDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/BusinessandSummaryofSignificantAccountingPoliciesTradeandNotesReceivableDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRecognitionMilestoneMethodLineItems_5e198140-9ade-456f-914d-ff94d701c9be" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RevenueRecognitionMilestoneMethodLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueRecognitionMilestoneMethodTable_214f9b0c-7b66-429b-b2d0-f40dafec3a56" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RevenueRecognitionMilestoneMethodTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RevenueRecognitionMilestoneMethodLineItems_5e198140-9ade-456f-914d-ff94d701c9be" xlink:to="loc_us-gaap_RevenueRecognitionMilestoneMethodTable_214f9b0c-7b66-429b-b2d0-f40dafec3a56" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_4bb20700-d68c-47b3-af9e-0df75f526fdb" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_RevenueRecognitionMilestoneMethodTable_214f9b0c-7b66-429b-b2d0-f40dafec3a56" xlink:to="loc_srt_RangeAxis_4bb20700-d68c-47b3-af9e-0df75f526fdb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_4bb20700-d68c-47b3-af9e-0df75f526fdb_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_4bb20700-d68c-47b3-af9e-0df75f526fdb" xlink:to="loc_srt_RangeMember_4bb20700-d68c-47b3-af9e-0df75f526fdb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_a71f1935-cbf9-43ce-a162-ff719a10e020" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_4bb20700-d68c-47b3-af9e-0df75f526fdb" xlink:to="loc_srt_RangeMember_a71f1935-cbf9-43ce-a162-ff719a10e020" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_17dd7ef6-3972-4b28-a741-cf25faf35662" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_a71f1935-cbf9-43ce-a162-ff719a10e020" xlink:to="loc_srt_MinimumMember_17dd7ef6-3972-4b28-a741-cf25faf35662" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_60bf5e75-754c-4c17-b1ab-d1242bf85b10" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_a71f1935-cbf9-43ce-a162-ff719a10e020" xlink:to="loc_srt_MaximumMember_60bf5e75-754c-4c17-b1ab-d1242bf85b10" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_AccrualforAgencyPremiumsPercentReportedwithin3Months_aedff958-9cf4-4604-8c4e-63711f51d286" xlink:href="fnf-20231231.xsd#fnf_AccrualforAgencyPremiumsPercentReportedwithin3Months"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRecognitionMilestoneMethodLineItems_5e198140-9ade-456f-914d-ff94d701c9be" xlink:to="loc_fnf_AccrualforAgencyPremiumsPercentReportedwithin3Months_aedff958-9cf4-4604-8c4e-63711f51d286" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_AccrualforAgencyPremiumsPercentReportedin46Months_f2ff9b08-d2d6-4426-80d6-03e04f6c9ad7" xlink:href="fnf-20231231.xsd#fnf_AccrualforAgencyPremiumsPercentReportedin46Months"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRecognitionMilestoneMethodLineItems_5e198140-9ade-456f-914d-ff94d701c9be" xlink:to="loc_fnf_AccrualforAgencyPremiumsPercentReportedin46Months_f2ff9b08-d2d6-4426-80d6-03e04f6c9ad7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_AccrualforAgencyPremiumsTimeLagPeriod_f61d76b9-7fe1-4ac7-9b00-e0144b2d4f60" xlink:href="fnf-20231231.xsd#fnf_AccrualforAgencyPremiumsTimeLagPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRecognitionMilestoneMethodLineItems_5e198140-9ade-456f-914d-ff94d701c9be" xlink:to="loc_fnf_AccrualforAgencyPremiumsTimeLagPeriod_f61d76b9-7fe1-4ac7-9b00-e0144b2d4f60" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_InsuranceCommissionsasPercentageofAgentPremiums_0e194fbe-38e7-419b-bab9-af3da3142c95" xlink:href="fnf-20231231.xsd#fnf_InsuranceCommissionsasPercentageofAgentPremiums"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRecognitionMilestoneMethodLineItems_5e198140-9ade-456f-914d-ff94d701c9be" xlink:to="loc_fnf_InsuranceCommissionsasPercentageofAgentPremiums_0e194fbe-38e7-419b-bab9-af3da3142c95" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_PremiumsReceivableNetofAccruedSalesCommissions_166a603a-5765-4100-81f4-ec3aac70dab2" xlink:href="fnf-20231231.xsd#fnf_PremiumsReceivableNetofAccruedSalesCommissions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenueRecognitionMilestoneMethodLineItems_5e198140-9ade-456f-914d-ff94d701c9be" xlink:to="loc_fnf_PremiumsReceivableNetofAccruedSalesCommissions_166a603a-5765-4100-81f4-ec3aac70dab2" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/BusinessandSummaryofSignificantAccountingPoliciesGoodwillIntangibleAssetsandPropertyandEquipmentDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#BusinessandSummaryofSignificantAccountingPoliciesGoodwillIntangibleAssetsandPropertyandEquipmentDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/BusinessandSummaryofSignificantAccountingPoliciesGoodwillIntangibleAssetsandPropertyandEquipmentDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillLineItems_9b28d3d9-ffa3-4ff9-8897-4793d5e01cee" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GoodwillLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfGoodwillTable_7eb4d759-d192-4152-a1cc-e55a5cad591d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfGoodwillTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_GoodwillLineItems_9b28d3d9-ffa3-4ff9-8897-4793d5e01cee" xlink:to="loc_us-gaap_ScheduleOfGoodwillTable_7eb4d759-d192-4152-a1cc-e55a5cad591d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_c6563887-7c21-49fa-81ab-630091f73083" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_7eb4d759-d192-4152-a1cc-e55a5cad591d" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_c6563887-7c21-49fa-81ab-630091f73083" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_c6563887-7c21-49fa-81ab-630091f73083_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_c6563887-7c21-49fa-81ab-630091f73083" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_c6563887-7c21-49fa-81ab-630091f73083_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_f934b6dc-dd5c-4c55-8bba-7df6c512c4d8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_c6563887-7c21-49fa-81ab-630091f73083" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_f934b6dc-dd5c-4c55-8bba-7df6c512c4d8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_5fc422c0-c4f0-4ced-845d-7a0b2e355495" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CustomerRelationshipsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_f934b6dc-dd5c-4c55-8bba-7df6c512c4d8" xlink:to="loc_us-gaap_CustomerRelationshipsMember_5fc422c0-c4f0-4ced-845d-7a0b2e355495" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TrademarksAndTradeNamesMember_670dad3d-592a-4678-a1b9-c1a1082af5f4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TrademarksAndTradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_f934b6dc-dd5c-4c55-8bba-7df6c512c4d8" xlink:to="loc_us-gaap_TrademarksAndTradeNamesMember_670dad3d-592a-4678-a1b9-c1a1082af5f4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_SoftwareMember_414ead09-9bc1-494f-a088-0934ddcc8663" xlink:href="fnf-20231231.xsd#fnf_SoftwareMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_f934b6dc-dd5c-4c55-8bba-7df6c512c4d8" xlink:to="loc_fnf_SoftwareMember_414ead09-9bc1-494f-a088-0934ddcc8663" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_9ce3a77e-4d6b-4d9a-9d40-6b4b9f7b6d96" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_7eb4d759-d192-4152-a1cc-e55a5cad591d" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_9ce3a77e-4d6b-4d9a-9d40-6b4b9f7b6d96" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_9ce3a77e-4d6b-4d9a-9d40-6b4b9f7b6d96_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_9ce3a77e-4d6b-4d9a-9d40-6b4b9f7b6d96" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_9ce3a77e-4d6b-4d9a-9d40-6b4b9f7b6d96_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_5667047c-b6c0-4ac6-922d-676eeb730d6c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis_9ce3a77e-4d6b-4d9a-9d40-6b4b9f7b6d96" xlink:to="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_5667047c-b6c0-4ac6-922d-676eeb730d6c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_TitlePlantMember_94f1d0eb-b33e-405e-9be0-e362b50f058a" xlink:href="fnf-20231231.xsd#fnf_TitlePlantMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_5667047c-b6c0-4ac6-922d-676eeb730d6c" xlink:to="loc_fnf_TitlePlantMember_94f1d0eb-b33e-405e-9be0-e362b50f058a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_c0912172-40ed-4440-9ea7-432701971cbe" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_7eb4d759-d192-4152-a1cc-e55a5cad591d" xlink:to="loc_srt_RangeAxis_c0912172-40ed-4440-9ea7-432701971cbe" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_c0912172-40ed-4440-9ea7-432701971cbe_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_c0912172-40ed-4440-9ea7-432701971cbe" xlink:to="loc_srt_RangeMember_c0912172-40ed-4440-9ea7-432701971cbe_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_f3419624-e48b-47c0-a2df-51b3ff635e49" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_c0912172-40ed-4440-9ea7-432701971cbe" xlink:to="loc_srt_RangeMember_f3419624-e48b-47c0-a2df-51b3ff635e49" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_1cd90e9d-76d7-481e-825a-04f68cc58501" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_f3419624-e48b-47c0-a2df-51b3ff635e49" xlink:to="loc_srt_MinimumMember_1cd90e9d-76d7-481e-825a-04f68cc58501" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_701fcce5-3f01-44b4-82fc-f36fc122ec97" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_f3419624-e48b-47c0-a2df-51b3ff635e49" xlink:to="loc_srt_MaximumMember_701fcce5-3f01-44b4-82fc-f36fc122ec97" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_c8240f02-f0e0-44b4-92af-ae01ec8d277c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_7eb4d759-d192-4152-a1cc-e55a5cad591d" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_c8240f02-f0e0-44b4-92af-ae01ec8d277c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_c8240f02-f0e0-44b4-92af-ae01ec8d277c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_c8240f02-f0e0-44b4-92af-ae01ec8d277c" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_c8240f02-f0e0-44b4-92af-ae01ec8d277c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_9c2cb0e4-1fd2-4896-983d-e6e45a2a2b47" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_c8240f02-f0e0-44b4-92af-ae01ec8d277c" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_9c2cb0e4-1fd2-4896-983d-e6e45a2a2b47" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingMember_5cf5f057-e22e-42ae-bf86-6a23ffeeaad8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BuildingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_9c2cb0e4-1fd2-4896-983d-e6e45a2a2b47" xlink:to="loc_us-gaap_BuildingMember_5cf5f057-e22e-42ae-bf86-6a23ffeeaad8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FurnitureFixtureAndEquipmentMember_2df7743f-a075-4564-b4df-eca0bc9816aa" xlink:href="fnf-20231231.xsd#fnf_FurnitureFixtureAndEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_9c2cb0e4-1fd2-4896-983d-e6e45a2a2b47" xlink:to="loc_fnf_FurnitureFixtureAndEquipmentMember_2df7743f-a075-4564-b4df-eca0bc9816aa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_ab1b8274-67bd-45d7-97c2-23e4a2fcedca" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_7eb4d759-d192-4152-a1cc-e55a5cad591d" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_ab1b8274-67bd-45d7-97c2-23e4a2fcedca" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_ab1b8274-67bd-45d7-97c2-23e4a2fcedca_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_ab1b8274-67bd-45d7-97c2-23e4a2fcedca" xlink:to="loc_us-gaap_SegmentDomain_ab1b8274-67bd-45d7-97c2-23e4a2fcedca_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_a1d90d59-b56a-422a-a451-28f2f79cca12" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_ab1b8274-67bd-45d7-97c2-23e4a2fcedca" xlink:to="loc_us-gaap_SegmentDomain_a1d90d59-b56a-422a-a451-28f2f79cca12" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FGSegmentMember_c4ff5def-d3f0-4fb3-b733-ac1b258e6444" xlink:href="fnf-20231231.xsd#fnf_FGSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_a1d90d59-b56a-422a-a451-28f2f79cca12" xlink:to="loc_fnf_FGSegmentMember_c4ff5def-d3f0-4fb3-b733-ac1b258e6444" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_9a3d4a80-31a7-4008-859a-5ae442b4db70" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_9b28d3d9-ffa3-4ff9-8897-4793d5e01cee" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetUsefulLife_9a3d4a80-31a7-4008-859a-5ae442b4db70" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_f28161f7-d342-4d32-a987-83fe4f204c87" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_9b28d3d9-ffa3-4ff9-8897-4793d5e01cee" xlink:to="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_f28161f7-d342-4d32-a987-83fe4f204c87" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill_bfdd9bef-a305-4eb0-9c51-fae9747d88cd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_9b28d3d9-ffa3-4ff9-8897-4793d5e01cee" xlink:to="loc_us-gaap_ImpairmentOfIntangibleAssetsIndefinitelivedExcludingGoodwill_bfdd9bef-a305-4eb0-9c51-fae9747d88cd" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_e51747d9-8a39-4db8-8e4f-3b365af738f9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_9b28d3d9-ffa3-4ff9-8897-4793d5e01cee" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentUsefulLife_e51747d9-8a39-4db8-8e4f-3b365af738f9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TangibleAssetImpairmentCharges_355dce0c-9149-4d1e-98f5-c028277668fa" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TangibleAssetImpairmentCharges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_9b28d3d9-ffa3-4ff9-8897-4793d5e01cee" xlink:to="loc_us-gaap_TangibleAssetImpairmentCharges_355dce0c-9149-4d1e-98f5-c028277668fa" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/BusinessandSummaryofSignificantAccountingPoliciesScheduleofChangesinOtherComprehensiveEarningsDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#BusinessandSummaryofSignificantAccountingPoliciesScheduleofChangesinOtherComprehensiveEarningsDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/BusinessandSummaryofSignificantAccountingPoliciesScheduleofChangesinOtherComprehensiveEarningsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_2807639b-f734-4579-87e7-40a20936c47f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_0cd22197-c029-469f-ad9a-561650b7c209" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_2807639b-f734-4579-87e7-40a20936c47f" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_0cd22197-c029-469f-ad9a-561650b7c209" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_560c0df5-40d4-4087-b831-5bba92751415" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossTable_0cd22197-c029-469f-ad9a-561650b7c209" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_560c0df5-40d4-4087-b831-5bba92751415" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_560c0df5-40d4-4087-b831-5bba92751415_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_560c0df5-40d4-4087-b831-5bba92751415" xlink:to="loc_us-gaap_EquityComponentDomain_560c0df5-40d4-4087-b831-5bba92751415_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_5ddb8de1-1ee4-4065-ae27-5cd246325a21" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_560c0df5-40d4-4087-b831-5bba92751415" xlink:to="loc_us-gaap_EquityComponentDomain_5ddb8de1-1ee4-4065-ae27-5cd246325a21" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_056b7605-ffa8-4d3b-bb86-4fd281ddf32f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_5ddb8de1-1ee4-4065-ae27-5cd246325a21" xlink:to="loc_us-gaap_AccumulatedNetUnrealizedInvestmentGainLossMember_056b7605-ffa8-4d3b-bb86-4fd281ddf32f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_AccumulatedNetInvestmentGainLossonEquityMethodInvestmentsArisingDuringPeriodAttributabletoParentMember_d7c1674c-af64-438e-82f3-b43470e5dc38" xlink:href="fnf-20231231.xsd#fnf_AccumulatedNetInvestmentGainLossonEquityMethodInvestmentsArisingDuringPeriodAttributabletoParentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_5ddb8de1-1ee4-4065-ae27-5cd246325a21" xlink:to="loc_fnf_AccumulatedNetInvestmentGainLossonEquityMethodInvestmentsArisingDuringPeriodAttributabletoParentMember_d7c1674c-af64-438e-82f3-b43470e5dc38" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedTranslationAdjustmentMember_a8080760-079a-487c-8e5b-b95874f61bea" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccumulatedTranslationAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_5ddb8de1-1ee4-4065-ae27-5cd246325a21" xlink:to="loc_us-gaap_AccumulatedTranslationAdjustmentMember_a8080760-079a-487c-8e5b-b95874f61bea" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_7da76846-b227-4849-9b9a-a220de3b7b2e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_5ddb8de1-1ee4-4065-ae27-5cd246325a21" xlink:to="loc_us-gaap_AccumulatedDefinedBenefitPlansAdjustmentMember_7da76846-b227-4849-9b9a-a220de3b7b2e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_4dcf8dca-c284-4aea-90fe-7c8556230bc7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_5ddb8de1-1ee4-4065-ae27-5cd246325a21" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_4dcf8dca-c284-4aea-90fe-7c8556230bc7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_15632216-968b-4b43-a336-6e9e006df2e5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_2807639b-f734-4579-87e7-40a20936c47f" xlink:to="loc_us-gaap_StockholdersEquity_15632216-968b-4b43-a336-6e9e006df2e5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent_9c565d3b-0278-401c-ae1d-61327dfe3095" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_2807639b-f734-4579-87e7-40a20936c47f" xlink:to="loc_us-gaap_ReclassificationFromAociCurrentPeriodNetOfTaxAttributableToParent_9c565d3b-0278-401c-ae1d-61327dfe3095" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OciBeforeReclassificationsNetOfTaxAttributableToParent_6d247314-a528-4b83-89af-29218307203e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OciBeforeReclassificationsNetOfTaxAttributableToParent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_2807639b-f734-4579-87e7-40a20936c47f" xlink:to="loc_us-gaap_OciBeforeReclassificationsNetOfTaxAttributableToParent_6d247314-a528-4b83-89af-29218307203e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterestSpinoff_d64880e8-ffaf-4c7b-92f3-7db707c36f2b" xlink:href="fnf-20231231.xsd#fnf_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterestSpinoff"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossLineItems_2807639b-f734-4579-87e7-40a20936c47f" xlink:to="loc_fnf_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterestSpinoff_d64880e8-ffaf-4c7b-92f3-7db707c36f2b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_0be15641-c1c9-4e82-9229-a380f7c0e43f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockholdersEquity"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/BusinessandSummaryofSignificantAccountingPoliciesManagementEstimatesDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#BusinessandSummaryofSignificantAccountingPoliciesManagementEstimatesDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/BusinessandSummaryofSignificantAccountingPoliciesManagementEstimatesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ChangeInAccountingEstimateLineItems_050a684f-dc57-406b-aa82-794e469433ac" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ChangeInAccountingEstimateLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfChangeInAccountingEstimateTable_92a86a58-c25f-4966-a4bb-850871611db1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfChangeInAccountingEstimateTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ChangeInAccountingEstimateLineItems_050a684f-dc57-406b-aa82-794e469433ac" xlink:to="loc_us-gaap_ScheduleOfChangeInAccountingEstimateTable_92a86a58-c25f-4966-a4bb-850871611db1" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ChangeInAccountingEstimateByTypeAxis_2272f70b-0c7b-4a67-a3f2-650fd6c0bac1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ChangeInAccountingEstimateByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfChangeInAccountingEstimateTable_92a86a58-c25f-4966-a4bb-850871611db1" xlink:to="loc_us-gaap_ChangeInAccountingEstimateByTypeAxis_2272f70b-0c7b-4a67-a3f2-650fd6c0bac1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ChangeInAccountingEstimateTypeDomain_2272f70b-0c7b-4a67-a3f2-650fd6c0bac1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ChangeInAccountingEstimateTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ChangeInAccountingEstimateByTypeAxis_2272f70b-0c7b-4a67-a3f2-650fd6c0bac1" xlink:to="loc_us-gaap_ChangeInAccountingEstimateTypeDomain_2272f70b-0c7b-4a67-a3f2-650fd6c0bac1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ChangeInAccountingEstimateTypeDomain_3e5a44f0-f9d9-4b32-91fd-54b8260e7af9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ChangeInAccountingEstimateTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ChangeInAccountingEstimateByTypeAxis_2272f70b-0c7b-4a67-a3f2-650fd6c0bac1" xlink:to="loc_us-gaap_ChangeInAccountingEstimateTypeDomain_3e5a44f0-f9d9-4b32-91fd-54b8260e7af9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ChangeInAccountingMethodAccountedForAsChangeInEstimateMember_d0c7f798-f545-44a0-b1b6-06e1d5a73680" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ChangeInAccountingMethodAccountedForAsChangeInEstimateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ChangeInAccountingEstimateTypeDomain_3e5a44f0-f9d9-4b32-91fd-54b8260e7af9" xlink:to="loc_us-gaap_ChangeInAccountingMethodAccountedForAsChangeInEstimateMember_d0c7f798-f545-44a0-b1b6-06e1d5a73680" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_PolicyholderBenefitsAndClaimsIncurredNetLifeAndAnnuityChangeInPolicyReservesIncreaseDecrease_34bf48e4-9326-4221-8aa7-c48fc803bca8" xlink:href="fnf-20231231.xsd#fnf_PolicyholderBenefitsAndClaimsIncurredNetLifeAndAnnuityChangeInPolicyReservesIncreaseDecrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ChangeInAccountingEstimateLineItems_050a684f-dc57-406b-aa82-794e469433ac" xlink:to="loc_fnf_PolicyholderBenefitsAndClaimsIncurredNetLifeAndAnnuityChangeInPolicyReservesIncreaseDecrease_34bf48e4-9326-4221-8aa7-c48fc803bca8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefits_0d001360-bde1-4f45-a139-891050786dbe" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ChangeInAccountingEstimateLineItems_050a684f-dc57-406b-aa82-794e469433ac" xlink:to="loc_us-gaap_LiabilityForFuturePolicyBenefits_0d001360-bde1-4f45-a139-891050786dbe" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/BusinessandSummaryofSignificantAccountingPoliciesOwnedDistributionInvestmentsDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#BusinessandSummaryofSignificantAccountingPoliciesOwnedDistributionInvestmentsDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/BusinessandSummaryofSignificantAccountingPoliciesOwnedDistributionInvestmentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionLineItems_e54d268e-a29c-4a75-80be-846017ca9579" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RelatedPartyTransactionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_519ebee1-2bb5-4d4f-bd70-961ae53996e2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_e54d268e-a29c-4a75-80be-846017ca9579" xlink:to="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_519ebee1-2bb5-4d4f-bd70-961ae53996e2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_f1162501-d924-49b9-afcd-d33822987d88" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_519ebee1-2bb5-4d4f-bd70-961ae53996e2" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_f1162501-d924-49b9-afcd-d33822987d88" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_f1162501-d924-49b9-afcd-d33822987d88_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_f1162501-d924-49b9-afcd-d33822987d88" xlink:to="loc_us-gaap_RelatedPartyDomain_f1162501-d924-49b9-afcd-d33822987d88_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_c4ce4ea6-6e72-4d82-9f10-2fc89717473e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_f1162501-d924-49b9-afcd-d33822987d88" xlink:to="loc_us-gaap_RelatedPartyDomain_c4ce4ea6-6e72-4d82-9f10-2fc89717473e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_AffiliatedEntityMember_e61f537e-9d2e-4b95-9e75-880080192c41" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_AffiliatedEntityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_c4ce4ea6-6e72-4d82-9f10-2fc89717473e" xlink:to="loc_srt_AffiliatedEntityMember_e61f537e-9d2e-4b95-9e75-880080192c41" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InsuranceCommissions_b8b81a37-eba9-43b2-91e9-1c9ba3376ec3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InsuranceCommissions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionLineItems_e54d268e-a29c-4a75-80be-846017ca9579" xlink:to="loc_us-gaap_InsuranceCommissions_b8b81a37-eba9-43b2-91e9-1c9ba3376ec3" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/AcquisitionsNarrativeDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#AcquisitionsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/AcquisitionsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionLineItems_70a43d69-7d10-494f-a440-a31db3bd2ead" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_de445de8-5f19-40d0-ae65-c74a07dcc7ee" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_70a43d69-7d10-494f-a440-a31db3bd2ead" xlink:to="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_de445de8-5f19-40d0-ae65-c74a07dcc7ee" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_cd386eb7-f0f6-4153-86fb-f422034af516" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfBusinessAcquisitionsByAcquisitionTable_de445de8-5f19-40d0-ae65-c74a07dcc7ee" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_cd386eb7-f0f6-4153-86fb-f422034af516" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_cd386eb7-f0f6-4153-86fb-f422034af516_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_cd386eb7-f0f6-4153-86fb-f422034af516" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_cd386eb7-f0f6-4153-86fb-f422034af516_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_8b4ff38d-2403-41c5-b78f-1d774150e51d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_cd386eb7-f0f6-4153-86fb-f422034af516" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_8b4ff38d-2403-41c5-b78f-1d774150e51d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_TitlePointMember_bd298e1f-a625-4aee-9888-38804b1f72ff" xlink:href="fnf-20231231.xsd#fnf_TitlePointMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_8b4ff38d-2403-41c5-b78f-1d774150e51d" xlink:to="loc_fnf_TitlePointMember_bd298e1f-a625-4aee-9888-38804b1f72ff" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_AllFirstTitleInsuranceAgencyMember_32ccc954-e65a-4168-87ac-f63392f22e14" xlink:href="fnf-20231231.xsd#fnf_AllFirstTitleInsuranceAgencyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_8b4ff38d-2403-41c5-b78f-1d774150e51d" xlink:to="loc_fnf_AllFirstTitleInsuranceAgencyMember_32ccc954-e65a-4168-87ac-f63392f22e14" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesGross_6bb7bc1b-7287-478b-9bf6-05e7405ad166" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsToAcquireBusinessesGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_70a43d69-7d10-494f-a440-a31db3bd2ead" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesGross_6bb7bc1b-7287-478b-9bf6-05e7405ad166" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_bc331e94-8def-446d-be07-399ea1d38be6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_70a43d69-7d10-494f-a440-a31db3bd2ead" xlink:to="loc_us-gaap_Goodwill_bc331e94-8def-446d-be07-399ea1d38be6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_05203704-bc9e-4d31-843d-34bdd5954b5f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_70a43d69-7d10-494f-a440-a31db3bd2ead" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_05203704-bc9e-4d31-843d-34bdd5954b5f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther_2968cd84-42d4-400c-bbd9-d486b44eb98b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_70a43d69-7d10-494f-a440-a31db3bd2ead" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAssetsOther_2968cd84-42d4-400c-bbd9-d486b44eb98b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_cee1d9eb-7ddc-4b02-8c9a-74b17ef0fddb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_70a43d69-7d10-494f-a440-a31db3bd2ead" xlink:to="loc_us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired_cee1d9eb-7ddc-4b02-8c9a-74b17ef0fddb" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_1515a03a-991b-4646-8a08-33f4b333c6bc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_70a43d69-7d10-494f-a440-a31db3bd2ead" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherNoncurrentAssets_1515a03a-991b-4646-8a08-33f4b333c6bc" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther_0afe51e0-b9eb-414b-8133-ccb94523c6b1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_70a43d69-7d10-494f-a440-a31db3bd2ead" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNoncurrentLiabilitiesOther_0afe51e0-b9eb-414b-8133-ccb94523c6b1" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestFairValue_a84f957a-d895-46b3-ba31-6ba4e7cf8054" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionLineItems_70a43d69-7d10-494f-a440-a31db3bd2ead" xlink:to="loc_us-gaap_BusinessCombinationAcquisitionOfLessThan100PercentNoncontrollingInterestFairValue_a84f957a-d895-46b3-ba31-6ba4e7cf8054" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/AcquisitionsCarryingValueandEstimatedUsefulLivesDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#AcquisitionsCarryingValueandEstimatedUsefulLivesDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/AcquisitionsCarryingValueandEstimatedUsefulLivesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_e90084f2-de76-4b10-856c-3a883e383d65" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_13e51b0e-a342-42c5-8ed0-44cda654224c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_e90084f2-de76-4b10-856c-3a883e383d65" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_13e51b0e-a342-42c5-8ed0-44cda654224c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_6920b8c8-8d76-4688-b012-2a578a90ee54" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_13e51b0e-a342-42c5-8ed0-44cda654224c" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_6920b8c8-8d76-4688-b012-2a578a90ee54" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_6920b8c8-8d76-4688-b012-2a578a90ee54_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_6920b8c8-8d76-4688-b012-2a578a90ee54" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_6920b8c8-8d76-4688-b012-2a578a90ee54_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_23f15d68-bd12-48de-a307-5c3cde041761" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_6920b8c8-8d76-4688-b012-2a578a90ee54" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_23f15d68-bd12-48de-a307-5c3cde041761" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_TitlePointMember_703e9f40-5fff-4bf8-ad16-c9eefdaeb99c" xlink:href="fnf-20231231.xsd#fnf_TitlePointMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_23f15d68-bd12-48de-a307-5c3cde041761" xlink:to="loc_fnf_TitlePointMember_703e9f40-5fff-4bf8-ad16-c9eefdaeb99c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_AllFirstTitleInsuranceAgencyMember_e317508e-2c2c-4fb9-a931-0bee195afb09" xlink:href="fnf-20231231.xsd#fnf_AllFirstTitleInsuranceAgencyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_23f15d68-bd12-48de-a307-5c3cde041761" xlink:to="loc_fnf_AllFirstTitleInsuranceAgencyMember_e317508e-2c2c-4fb9-a931-0bee195afb09" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_d4f98962-38bc-409b-adb9-05d1288caed8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_13e51b0e-a342-42c5-8ed0-44cda654224c" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_d4f98962-38bc-409b-adb9-05d1288caed8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_d4f98962-38bc-409b-adb9-05d1288caed8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_d4f98962-38bc-409b-adb9-05d1288caed8" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_d4f98962-38bc-409b-adb9-05d1288caed8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_c5fc66f1-0fd5-4648-9b08-f6e9a2cd6a09" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_d4f98962-38bc-409b-adb9-05d1288caed8" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_c5fc66f1-0fd5-4648-9b08-f6e9a2cd6a09" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CustomerRelationshipsMember_de60ff79-0b93-439c-a127-a74385989575" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CustomerRelationshipsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_c5fc66f1-0fd5-4648-9b08-f6e9a2cd6a09" xlink:to="loc_us-gaap_CustomerRelationshipsMember_de60ff79-0b93-439c-a127-a74385989575" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TradeNamesMember_0791a515-465f-4eae-b282-5ae3ea6c0457" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_c5fc66f1-0fd5-4648-9b08-f6e9a2cd6a09" xlink:to="loc_us-gaap_TradeNamesMember_0791a515-465f-4eae-b282-5ae3ea6c0457" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NoncompeteAgreementsMember_33540a0a-7333-4ed9-99a6-f06dbfca4724" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NoncompeteAgreementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_c5fc66f1-0fd5-4648-9b08-f6e9a2cd6a09" xlink:to="loc_us-gaap_NoncompeteAgreementsMember_33540a0a-7333-4ed9-99a6-f06dbfca4724" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComputerSoftwareIntangibleAssetMember_70b43ef8-2a7a-497d-a58e-a017ccaeb075" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ComputerSoftwareIntangibleAssetMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_c5fc66f1-0fd5-4648-9b08-f6e9a2cd6a09" xlink:to="loc_us-gaap_ComputerSoftwareIntangibleAssetMember_70b43ef8-2a7a-497d-a58e-a017ccaeb075" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_f85735f4-b372-4226-a19f-cff6e26ff7d8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_e90084f2-de76-4b10-856c-3a883e383d65" xlink:to="loc_us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibles_f85735f4-b372-4226-a19f-cff6e26ff7d8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_1dab4d7e-8d59-44c3-8e6d-c9cf3a62054c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_e90084f2-de76-4b10-856c-3a883e383d65" xlink:to="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_1dab4d7e-8d59-44c3-8e6d-c9cf3a62054c" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/SummaryofReserveforTitleClaimLossesSummaryDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#SummaryofReserveforTitleClaimLossesSummaryDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/SummaryofReserveforTitleClaimLossesSummaryDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesLineItems_57f33475-dd86-40c4-ac6f-b1216e6eb617" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LossContingenciesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesTable_bd4b0f14-d9cc-4bbe-8e32-4e76385c0054" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LossContingenciesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LossContingenciesLineItems_57f33475-dd86-40c4-ac6f-b1216e6eb617" xlink:to="loc_us-gaap_LossContingenciesTable_bd4b0f14-d9cc-4bbe-8e32-4e76385c0054" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_6a5dcf7d-91b3-4a8a-905d-830c42453544" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_bd4b0f14-d9cc-4bbe-8e32-4e76385c0054" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_6a5dcf7d-91b3-4a8a-905d-830c42453544" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_6a5dcf7d-91b3-4a8a-905d-830c42453544_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_6a5dcf7d-91b3-4a8a-905d-830c42453544" xlink:to="loc_us-gaap_SegmentDomain_6a5dcf7d-91b3-4a8a-905d-830c42453544_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_23ca5d39-850d-4331-afd4-8ce9371cc2ff" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_6a5dcf7d-91b3-4a8a-905d-830c42453544" xlink:to="loc_us-gaap_SegmentDomain_23ca5d39-850d-4331-afd4-8ce9371cc2ff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_TitleSegmentMember_e5c8b308-3f61-4383-8a67-10b3bb02c4f8" xlink:href="fnf-20231231.xsd#fnf_TitleSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_23ca5d39-850d-4331-afd4-8ce9371cc2ff" xlink:to="loc_fnf_TitleSegmentMember_e5c8b308-3f61-4383-8a67-10b3bb02c4f8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNetAbstract_098f58e0-a662-4970-9f25-89489bd6bcc2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNetAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_57f33475-dd86-40c4-ac6f-b1216e6eb617" xlink:to="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNetAbstract_098f58e0-a662-4970-9f25-89489bd6bcc2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense_acbc14ab-0586-456b-b2fe-9652a6015834" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNetAbstract_098f58e0-a662-4970-9f25-89489bd6bcc2" xlink:to="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense_acbc14ab-0586-456b-b2fe-9652a6015834" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInReinsuranceRecoverable_0c4a60be-8252-4fff-b6f1-a8900ceb9954" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInReinsuranceRecoverable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNetAbstract_098f58e0-a662-4970-9f25-89489bd6bcc2" xlink:to="loc_us-gaap_IncreaseDecreaseInReinsuranceRecoverable_0c4a60be-8252-4fff-b6f1-a8900ceb9954" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaimsAbstract_a693c397-f9c1-4acb-b362-1c346864cba6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaimsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNetAbstract_098f58e0-a662-4970-9f25-89489bd6bcc2" xlink:to="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaimsAbstract_a693c397-f9c1-4acb-b362-1c346864cba6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense_6398c037-d924-4960-bc42-ae5be69d9407" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaimsAbstract_a693c397-f9c1-4acb-b362-1c346864cba6" xlink:to="loc_us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense_6398c037-d924-4960-bc42-ae5be69d9407" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense_cc26dfdb-c645-42e7-a676-b85b1c79a4ed" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaimsAbstract_a693c397-f9c1-4acb-b362-1c346864cba6" xlink:to="loc_us-gaap_SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense_cc26dfdb-c645-42e7-a676-b85b1c79a4ed" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1_ad6263aa-6d16-459a-ae62-9d613d37be94" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaimsAbstract_a693c397-f9c1-4acb-b362-1c346864cba6" xlink:to="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1_ad6263aa-6d16-459a-ae62-9d613d37be94" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidAbstract_e5f0f807-60ff-4f94-850b-e322034a4cff" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNetAbstract_098f58e0-a662-4970-9f25-89489bd6bcc2" xlink:to="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidAbstract_e5f0f807-60ff-4f94-850b-e322034a4cff" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1_f8956a1e-ea99-4416-87db-3be098fddf24" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidAbstract_e5f0f807-60ff-4f94-850b-e322034a4cff" xlink:to="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1_f8956a1e-ea99-4416-87db-3be098fddf24" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1_752504d5-604c-4859-9b1a-8740cf4c6283" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidAbstract_e5f0f807-60ff-4f94-850b-e322034a4cff" xlink:to="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1_752504d5-604c-4859-9b1a-8740cf4c6283" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForLossesAndLossAdjustmentExpense_40f92cc0-a8a3-4483-8829-dcf2d587a776" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsForLossesAndLossAdjustmentExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidAbstract_e5f0f807-60ff-4f94-850b-e322034a4cff" xlink:to="loc_us-gaap_PaymentsForLossesAndLossAdjustmentExpense_40f92cc0-a8a3-4483-8829-dcf2d587a776" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense_f402bd1d-194b-4090-a1d3-9099dd544b46" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForClaimsAndClaimsAdjustmentExpense"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_ProvisionForTitleInsuranceClaimsOnCurrentYearPolicies_9ca5f357-7b33-4cc8-9ed3-a47f72fc26db" xlink:href="fnf-20231231.xsd#fnf_ProvisionForTitleInsuranceClaimsOnCurrentYearPolicies"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNetAbstract_098f58e0-a662-4970-9f25-89489bd6bcc2" xlink:to="loc_fnf_ProvisionForTitleInsuranceClaimsOnCurrentYearPolicies_9ca5f357-7b33-4cc8-9ed3-a47f72fc26db" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/SummaryofReserveforTitleClaimLossesNarrativeDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#SummaryofReserveforTitleClaimLossesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/SummaryofReserveforTitleClaimLossesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesLineItems_799f7a2a-6eab-46f7-92e4-1edc5ff909e0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LossContingenciesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesTable_3e546490-d448-42cf-9879-a38f71e56627" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LossContingenciesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LossContingenciesLineItems_799f7a2a-6eab-46f7-92e4-1edc5ff909e0" xlink:to="loc_us-gaap_LossContingenciesTable_3e546490-d448-42cf-9879-a38f71e56627" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LitigationStatusAxis_00ddccd8-a801-46f8-a046-5fff612dc0de" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LitigationStatusAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_3e546490-d448-42cf-9879-a38f71e56627" xlink:to="loc_us-gaap_LitigationStatusAxis_00ddccd8-a801-46f8-a046-5fff612dc0de" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LitigationStatusDomain_00ddccd8-a801-46f8-a046-5fff612dc0de_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LitigationStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LitigationStatusAxis_00ddccd8-a801-46f8-a046-5fff612dc0de" xlink:to="loc_us-gaap_LitigationStatusDomain_00ddccd8-a801-46f8-a046-5fff612dc0de_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LitigationStatusDomain_647ae1ce-4f82-4183-b6b1-0db10517e23b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LitigationStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LitigationStatusAxis_00ddccd8-a801-46f8-a046-5fff612dc0de" xlink:to="loc_us-gaap_LitigationStatusDomain_647ae1ce-4f82-4183-b6b1-0db10517e23b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PendingLitigationMember_7d59f8cc-20f4-47cf-a20e-8896f71a313c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PendingLitigationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LitigationStatusDomain_647ae1ce-4f82-4183-b6b1-0db10517e23b" xlink:to="loc_us-gaap_PendingLitigationMember_7d59f8cc-20f4-47cf-a20e-8896f71a313c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseAxis_6f5b608d-6f43-4489-9ed7-bd04d61754f5" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_LitigationCaseAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LossContingenciesTable_3e546490-d448-42cf-9879-a38f71e56627" xlink:to="loc_srt_LitigationCaseAxis_6f5b608d-6f43-4489-9ed7-bd04d61754f5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseTypeDomain_6f5b608d-6f43-4489-9ed7-bd04d61754f5_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_LitigationCaseTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_LitigationCaseAxis_6f5b608d-6f43-4489-9ed7-bd04d61754f5" xlink:to="loc_srt_LitigationCaseTypeDomain_6f5b608d-6f43-4489-9ed7-bd04d61754f5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseTypeDomain_08808aac-942a-4ced-ab91-8623648ea24c" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_LitigationCaseTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_LitigationCaseAxis_6f5b608d-6f43-4489-9ed7-bd04d61754f5" xlink:to="loc_srt_LitigationCaseTypeDomain_08808aac-942a-4ced-ab91-8623648ea24c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_KimFundingLLCKimHPetersonJosephJCohenAndABCFundingStrategiesLLCVChicagoTitleCoChicagoTitleInsCoThomasSchwiebertAdelleDucharmeAndBettyElixmanMember_aef484df-2b5e-4da3-af81-b10bfb3a6795" xlink:href="fnf-20231231.xsd#fnf_KimFundingLLCKimHPetersonJosephJCohenAndABCFundingStrategiesLLCVChicagoTitleCoChicagoTitleInsCoThomasSchwiebertAdelleDucharmeAndBettyElixmanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_LitigationCaseTypeDomain_08808aac-942a-4ced-ab91-8623648ea24c" xlink:to="loc_fnf_KimFundingLLCKimHPetersonJosephJCohenAndABCFundingStrategiesLLCVChicagoTitleCoChicagoTitleInsCoThomasSchwiebertAdelleDucharmeAndBettyElixmanMember_aef484df-2b5e-4da3-af81-b10bfb3a6795" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_BancOfCaliforniaNationalAssociationVLauriePetersonMember_cc04d43d-a080-464a-956e-3ccccc7b4620" xlink:href="fnf-20231231.xsd#fnf_BancOfCaliforniaNationalAssociationVLauriePetersonMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_LitigationCaseTypeDomain_08808aac-942a-4ced-ab91-8623648ea24c" xlink:to="loc_fnf_BancOfCaliforniaNationalAssociationVLauriePetersonMember_cc04d43d-a080-464a-956e-3ccccc7b4620" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_LauriePetersonVChicagoTitleCoChicagoTitleInsCoThomasSchwiebertAdelleDucharmeAndBettyElixmanMember_9145d68c-66c3-4682-bcaa-60966259af2a" xlink:href="fnf-20231231.xsd#fnf_LauriePetersonVChicagoTitleCoChicagoTitleInsCoThomasSchwiebertAdelleDucharmeAndBettyElixmanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_LitigationCaseTypeDomain_08808aac-942a-4ced-ab91-8623648ea24c" xlink:to="loc_fnf_LauriePetersonVChicagoTitleCoChicagoTitleInsCoThomasSchwiebertAdelleDucharmeAndBettyElixmanMember_9145d68c-66c3-4682-bcaa-60966259af2a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_CalPrivateBankVKimHPetersonTrusteeOfThePetersonFamilyTrustDatedApril141992Member_d7cb00a4-547d-41ca-bcb3-0f4b703697bb" xlink:href="fnf-20231231.xsd#fnf_CalPrivateBankVKimHPetersonTrusteeOfThePetersonFamilyTrustDatedApril141992Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_LitigationCaseTypeDomain_08808aac-942a-4ced-ab91-8623648ea24c" xlink:to="loc_fnf_CalPrivateBankVKimHPetersonTrusteeOfThePetersonFamilyTrustDatedApril141992Member_d7cb00a4-547d-41ca-bcb3-0f4b703697bb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_KimHPetersonTrusteeOfThePetersonFamilyTrustDatedApril141992VChicagoTitleCoChicagoTitleInsCoThomasSchwiebertAdelleDucharmeAndBettyElixmanMember_bf9faaf9-dc03-4807-b605-4bd92a45cf3e" xlink:href="fnf-20231231.xsd#fnf_KimHPetersonTrusteeOfThePetersonFamilyTrustDatedApril141992VChicagoTitleCoChicagoTitleInsCoThomasSchwiebertAdelleDucharmeAndBettyElixmanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_LitigationCaseTypeDomain_08808aac-942a-4ced-ab91-8623648ea24c" xlink:to="loc_fnf_KimHPetersonTrusteeOfThePetersonFamilyTrustDatedApril141992VChicagoTitleCoChicagoTitleInsCoThomasSchwiebertAdelleDucharmeAndBettyElixmanMember_bf9faaf9-dc03-4807-b605-4bd92a45cf3e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_CalPrivateBankVChicagoTitleCoAndChicagoTitleInsCoMember_66c60383-1231-4c56-ad5b-e849cf60bf57" xlink:href="fnf-20231231.xsd#fnf_CalPrivateBankVChicagoTitleCoAndChicagoTitleInsCoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_LitigationCaseTypeDomain_08808aac-942a-4ced-ab91-8623648ea24c" xlink:to="loc_fnf_CalPrivateBankVChicagoTitleCoAndChicagoTitleInsCoMember_66c60383-1231-4c56-ad5b-e849cf60bf57" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyDamagesSoughtValue_3febf024-de57-4407-984b-e60cf7fa71d6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LossContingencyDamagesSoughtValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingenciesLineItems_799f7a2a-6eab-46f7-92e4-1edc5ff909e0" xlink:to="loc_us-gaap_LossContingencyDamagesSoughtValue_3febf024-de57-4407-984b-e60cf7fa71d6" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/FairValueofFinancialInstrumentsCarryingAmountsofAssetsandLiabilitiesatEstimatedFairValueMeasuredonaRecurringBasisDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#FairValueofFinancialInstrumentsCarryingAmountsofAssetsandLiabilitiesatEstimatedFairValueMeasuredonaRecurringBasisDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/FairValueofFinancialInstrumentsCarryingAmountsofAssetsandLiabilitiesatEstimatedFairValueMeasuredonaRecurringBasisDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_eb32d305-6064-4855-8481-e1f5b8cb8e5e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_a2dcb9fe-b0b8-4e1d-ae5b-593f16ef3bd2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_eb32d305-6064-4855-8481-e1f5b8cb8e5e" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_a2dcb9fe-b0b8-4e1d-ae5b-593f16ef3bd2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_78e12754-559d-42b0-8cee-036d55cdecb7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_a2dcb9fe-b0b8-4e1d-ae5b-593f16ef3bd2" xlink:to="loc_us-gaap_FinancialInstrumentAxis_78e12754-559d-42b0-8cee-036d55cdecb7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_78e12754-559d-42b0-8cee-036d55cdecb7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_78e12754-559d-42b0-8cee-036d55cdecb7" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_78e12754-559d-42b0-8cee-036d55cdecb7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7f979363-58fc-4d14-8c78-0e82f64b099f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_78e12754-559d-42b0-8cee-036d55cdecb7" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7f979363-58fc-4d14-8c78-0e82f64b099f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_eecdad74-55cc-41cb-a0ca-132c0e80586f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AssetBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7f979363-58fc-4d14-8c78-0e82f64b099f" xlink:to="loc_us-gaap_AssetBackedSecuritiesMember_eecdad74-55cc-41cb-a0ca-132c0e80586f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialMortgageBackedSecuritiesMember_c8b6289b-7c1b-4d24-a838-c6a4c2b19c60" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommercialMortgageBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7f979363-58fc-4d14-8c78-0e82f64b099f" xlink:to="loc_us-gaap_CommercialMortgageBackedSecuritiesMember_c8b6289b-7c1b-4d24-a838-c6a4c2b19c60" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_526be619-a6fb-43d3-9561-2a2e6ef55c55" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7f979363-58fc-4d14-8c78-0e82f64b099f" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_526be619-a6fb-43d3-9561-2a2e6ef55c55" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_HybridsMember_29083858-fb80-42d8-a57b-bb679df4b443" xlink:href="fnf-20231231.xsd#fnf_HybridsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7f979363-58fc-4d14-8c78-0e82f64b099f" xlink:to="loc_fnf_HybridsMember_29083858-fb80-42d8-a57b-bb679df4b443" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USStatesAndPoliticalSubdivisionsMember_9f807d0b-928a-49a4-b888-77d0b50bffdb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_USStatesAndPoliticalSubdivisionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7f979363-58fc-4d14-8c78-0e82f64b099f" xlink:to="loc_us-gaap_USStatesAndPoliticalSubdivisionsMember_9f807d0b-928a-49a4-b888-77d0b50bffdb" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResidentialMortgageBackedSecuritiesMember_7d8623aa-b170-46af-8e90-6034b13e7ed6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ResidentialMortgageBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7f979363-58fc-4d14-8c78-0e82f64b099f" xlink:to="loc_us-gaap_ResidentialMortgageBackedSecuritiesMember_7d8623aa-b170-46af-8e90-6034b13e7ed6" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_1a8c622e-6df4-48a6-a629-bf312ff770bb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_USGovernmentAgenciesDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7f979363-58fc-4d14-8c78-0e82f64b099f" xlink:to="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_1a8c622e-6df4-48a6-a629-bf312ff770bb" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignGovernmentDebtSecuritiesMember_eea309ad-fac9-4e4d-9451-1aff69ac2d2a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ForeignGovernmentDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7f979363-58fc-4d14-8c78-0e82f64b099f" xlink:to="loc_us-gaap_ForeignGovernmentDebtSecuritiesMember_eea309ad-fac9-4e4d-9451-1aff69ac2d2a" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockMember_450c6db5-e96f-4492-b0d3-ae5f04e3d7c1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7f979363-58fc-4d14-8c78-0e82f64b099f" xlink:to="loc_us-gaap_CommonStockMember_450c6db5-e96f-4492-b0d3-ae5f04e3d7c1" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockMember_a2b44067-aefa-44bf-a7c9-e1b1151260d4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7f979363-58fc-4d14-8c78-0e82f64b099f" xlink:to="loc_us-gaap_PreferredStockMember_a2b44067-aefa-44bf-a7c9-e1b1151260d4" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FEGInvestmentMember_91b7ef5c-256a-4124-8df5-b4fb492b1587" xlink:href="fnf-20231231.xsd#fnf_FEGInvestmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7f979363-58fc-4d14-8c78-0e82f64b099f" xlink:to="loc_fnf_FEGInvestmentMember_91b7ef5c-256a-4124-8df5-b4fb492b1587" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLongTermInvestmentsMember_0bc82404-66da-425e-b69f-fc65a853184b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherLongTermInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7f979363-58fc-4d14-8c78-0e82f64b099f" xlink:to="loc_us-gaap_OtherLongTermInvestmentsMember_0bc82404-66da-425e-b69f-fc65a853184b" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_479de703-66f5-49d5-bf9a-b02c0545fea1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_a2dcb9fe-b0b8-4e1d-ae5b-593f16ef3bd2" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_479de703-66f5-49d5-bf9a-b02c0545fea1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_479de703-66f5-49d5-bf9a-b02c0545fea1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_479de703-66f5-49d5-bf9a-b02c0545fea1" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_479de703-66f5-49d5-bf9a-b02c0545fea1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_acdd1ec1-6b0e-46d6-aa9f-74099986ad62" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_479de703-66f5-49d5-bf9a-b02c0545fea1" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_acdd1ec1-6b0e-46d6-aa9f-74099986ad62" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_EmbeddedDerivativesinReinsuranceContractsMember_faade48e-01ef-4add-a123-fac70340e28f" xlink:href="fnf-20231231.xsd#fnf_EmbeddedDerivativesinReinsuranceContractsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_acdd1ec1-6b0e-46d6-aa9f-74099986ad62" xlink:to="loc_fnf_EmbeddedDerivativesinReinsuranceContractsMember_faade48e-01ef-4add-a123-fac70340e28f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FixedIndexAnnuityMember_51ce497f-20b0-4ea3-bbf8-c7351811b3bd" xlink:href="fnf-20231231.xsd#fnf_FixedIndexAnnuityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_acdd1ec1-6b0e-46d6-aa9f-74099986ad62" xlink:to="loc_fnf_FixedIndexAnnuityMember_51ce497f-20b0-4ea3-bbf8-c7351811b3bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_EmbeddedDerivativesAssetsInReinsuranceContractsMember_ef784b00-4640-440c-9866-29539a96a30d" xlink:href="fnf-20231231.xsd#fnf_EmbeddedDerivativesAssetsInReinsuranceContractsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_acdd1ec1-6b0e-46d6-aa9f-74099986ad62" xlink:to="loc_fnf_EmbeddedDerivativesAssetsInReinsuranceContractsMember_ef784b00-4640-440c-9866-29539a96a30d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FutureMember_c703102f-82c0-4a73-9b6a-24dac9528475" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FutureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_acdd1ec1-6b0e-46d6-aa9f-74099986ad62" xlink:to="loc_us-gaap_FutureMember_c703102f-82c0-4a73-9b6a-24dac9528475" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_cdcb7eff-59dd-4bdd-a154-8f8adaf96a35" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_a2dcb9fe-b0b8-4e1d-ae5b-593f16ef3bd2" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_cdcb7eff-59dd-4bdd-a154-8f8adaf96a35" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_cdcb7eff-59dd-4bdd-a154-8f8adaf96a35_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_cdcb7eff-59dd-4bdd-a154-8f8adaf96a35" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_cdcb7eff-59dd-4bdd-a154-8f8adaf96a35_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_9f1e58b2-d35e-4d36-a2a8-279d448c9259" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_cdcb7eff-59dd-4bdd-a154-8f8adaf96a35" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_9f1e58b2-d35e-4d36-a2a8-279d448c9259" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_a1398e16-5f88-4cf6-9314-4d2c61af3ee1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_9f1e58b2-d35e-4d36-a2a8-279d448c9259" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_a1398e16-5f88-4cf6-9314-4d2c61af3ee1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_b7046b94-aa22-4672-9a6a-a03dc30b5e7f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_9f1e58b2-d35e-4d36-a2a8-279d448c9259" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_b7046b94-aa22-4672-9a6a-a03dc30b5e7f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_0862b162-9394-42a8-8c8a-90121d6e5d6a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_a2dcb9fe-b0b8-4e1d-ae5b-593f16ef3bd2" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_0862b162-9394-42a8-8c8a-90121d6e5d6a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_0862b162-9394-42a8-8c8a-90121d6e5d6a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_0862b162-9394-42a8-8c8a-90121d6e5d6a" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_0862b162-9394-42a8-8c8a-90121d6e5d6a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_48889185-e596-4c11-b864-cfd0d87643e2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_0862b162-9394-42a8-8c8a-90121d6e5d6a" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_48889185-e596-4c11-b864-cfd0d87643e2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_ad70c40c-3958-4aca-9055-06456fa5e751" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_48889185-e596-4c11-b864-cfd0d87643e2" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_ad70c40c-3958-4aca-9055-06456fa5e751" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_12a68fdd-16c4-4a1c-a743-94b5e49de07b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_48889185-e596-4c11-b864-cfd0d87643e2" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_12a68fdd-16c4-4a1c-a743-94b5e49de07b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_2165d8c9-62e6-4447-a43e-a3b4c27d0b01" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_48889185-e596-4c11-b864-cfd0d87643e2" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_2165d8c9-62e6-4447-a43e-a3b4c27d0b01" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember_302ba54d-6c7e-495d-a5da-161de9dfa41f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_48889185-e596-4c11-b864-cfd0d87643e2" xlink:to="loc_us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember_302ba54d-6c7e-495d-a5da-161de9dfa41f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosureAbstract_1eb806df-02f1-4a02-8e8a-0fdc25095f54" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AssetsFairValueDisclosureAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_eb32d305-6064-4855-8481-e1f5b8cb8e5e" xlink:to="loc_us-gaap_AssetsFairValueDisclosureAbstract_1eb806df-02f1-4a02-8e8a-0fdc25095f54" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_ec1ac09d-85f4-41ca-a0a0-0ee4628f817d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_1eb806df-02f1-4a02-8e8a-0fdc25095f54" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_ec1ac09d-85f4-41ca-a0a0-0ee4628f817d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_fb2dfc6d-5ece-4e6d-a416-7215c20e904e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_1eb806df-02f1-4a02-8e8a-0fdc25095f54" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_fb2dfc6d-5ece-4e6d-a416-7215c20e904e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNi_50e2b625-56ab-462b-be94-e49e83baa8ce" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquitySecuritiesFvNi"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_1eb806df-02f1-4a02-8e8a-0fdc25095f54" xlink:to="loc_us-gaap_EquitySecuritiesFvNi_50e2b625-56ab-462b-be94-e49e83baa8ce" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssets_b3fdf8a3-26e8-4b09-8cdb-f5152addbc5d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_1eb806df-02f1-4a02-8e8a-0fdc25095f54" xlink:to="loc_us-gaap_DerivativeAssets_b3fdf8a3-26e8-4b09-8cdb-f5152addbc5d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentsFairValueDisclosure_b2e19b4d-b849-4277-84a7-9d97bc03016b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityMethodInvestmentsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_1eb806df-02f1-4a02-8e8a-0fdc25095f54" xlink:to="loc_us-gaap_EquityMethodInvestmentsFairValueDisclosure_b2e19b4d-b849-4277-84a7-9d97bc03016b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_ShortTermInvestmentsFairValue_b06dd59c-9647-4d45-8369-4fc39095b14d" xlink:href="fnf-20231231.xsd#fnf_ShortTermInvestmentsFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_1eb806df-02f1-4a02-8e8a-0fdc25095f54" xlink:to="loc_fnf_ShortTermInvestmentsFairValue_b06dd59c-9647-4d45-8369-4fc39095b14d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketRiskBenefitAssetAmount_9e84f3dd-d6f4-4f29-9c95-c9bbbccb48c6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MarketRiskBenefitAssetAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_1eb806df-02f1-4a02-8e8a-0fdc25095f54" xlink:to="loc_us-gaap_MarketRiskBenefitAssetAmount_9e84f3dd-d6f4-4f29-9c95-c9bbbccb48c6" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsFairValueDisclosure_e05ac9e4-9da2-4e31-ab14-0fbf18839213" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherAssetsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_1eb806df-02f1-4a02-8e8a-0fdc25095f54" xlink:to="loc_us-gaap_OtherAssetsFairValueDisclosure_e05ac9e4-9da2-4e31-ab14-0fbf18839213" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_a5e05e36-aa96-4abc-a9b8-e17729f86848" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AssetsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_1eb806df-02f1-4a02-8e8a-0fdc25095f54" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_a5e05e36-aa96-4abc-a9b8-e17729f86848" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_2c4eac2c-a46a-4143-a21c-c16a0ab482ac" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilitiesFairValueDisclosureAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_eb32d305-6064-4855-8481-e1f5b8cb8e5e" xlink:to="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_2c4eac2c-a46a-4143-a21c-c16a0ab482ac" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetsAbstract_e48a794e-b7ee-4c96-94ba-042d4bdb1d9e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeAssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_eb32d305-6064-4855-8481-e1f5b8cb8e5e" xlink:to="loc_us-gaap_DerivativeAssetsAbstract_e48a794e-b7ee-4c96-94ba-042d4bdb1d9e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLiabilities_b7658148-577d-45d0-9b61-63808b7fa6f6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeAssetsAbstract_e48a794e-b7ee-4c96-94ba-042d4bdb1d9e" xlink:to="loc_us-gaap_DerivativeLiabilities_b7658148-577d-45d0-9b61-63808b7fa6f6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketRiskBenefitLiabilityAmount_8a845463-872c-4407-bca8-da7a9d8cacb1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MarketRiskBenefitLiabilityAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeAssetsAbstract_e48a794e-b7ee-4c96-94ba-042d4bdb1d9e" xlink:to="loc_us-gaap_MarketRiskBenefitLiabilityAmount_8a845463-872c-4407-bca8-da7a9d8cacb1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialLiabilitiesFairValueDisclosure_ede022b6-fc15-46fd-98ac-4a4d6a88cff2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancialLiabilitiesFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeAssetsAbstract_e48a794e-b7ee-4c96-94ba-042d4bdb1d9e" xlink:to="loc_us-gaap_FinancialLiabilitiesFairValueDisclosure_ede022b6-fc15-46fd-98ac-4a4d6a88cff2" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/FairValueofFinancialInstrumentsQuantitativeInformationofUnobservableInputsUsedforLevelThreeFairValueMeasurementsofFinancialInstrumentsonRecurringBasisDetail" xlink:type="simple" xlink:href="fnf-20231231.xsd#FairValueofFinancialInstrumentsQuantitativeInformationofUnobservableInputsUsedforLevelThreeFairValueMeasurementsofFinancialInstrumentsonRecurringBasisDetail"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/FairValueofFinancialInstrumentsQuantitativeInformationofUnobservableInputsUsedforLevelThreeFairValueMeasurementsofFinancialInstrumentsonRecurringBasisDetail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_5e29e62c-b837-4d26-9014-086158ccd226" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_65a40c42-2fbd-4172-8556-2ab296aafbc3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_5e29e62c-b837-4d26-9014-086158ccd226" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_65a40c42-2fbd-4172-8556-2ab296aafbc3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_8ee8ba00-ea3d-4ba1-ac57-bb6a5bf46f79" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_65a40c42-2fbd-4172-8556-2ab296aafbc3" xlink:to="loc_us-gaap_FinancialInstrumentAxis_8ee8ba00-ea3d-4ba1-ac57-bb6a5bf46f79" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_8ee8ba00-ea3d-4ba1-ac57-bb6a5bf46f79_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_8ee8ba00-ea3d-4ba1-ac57-bb6a5bf46f79" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_8ee8ba00-ea3d-4ba1-ac57-bb6a5bf46f79_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_91f91c81-ed1e-448d-ba26-358c2ea57530" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_8ee8ba00-ea3d-4ba1-ac57-bb6a5bf46f79" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_91f91c81-ed1e-448d-ba26-358c2ea57530" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_8ea97d69-30fc-4941-a404-ea80598f0f09" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AssetBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_91f91c81-ed1e-448d-ba26-358c2ea57530" xlink:to="loc_us-gaap_AssetBackedSecuritiesMember_8ea97d69-30fc-4941-a404-ea80598f0f09" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_8ec72d88-1129-4db4-b847-7a7f5ea6ad91" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_91f91c81-ed1e-448d-ba26-358c2ea57530" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_8ec72d88-1129-4db4-b847-7a7f5ea6ad91" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USStatesAndPoliticalSubdivisionsMember_ba4416ba-daae-4d78-bd81-dcc931c6ded1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_USStatesAndPoliticalSubdivisionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_91f91c81-ed1e-448d-ba26-358c2ea57530" xlink:to="loc_us-gaap_USStatesAndPoliticalSubdivisionsMember_ba4416ba-daae-4d78-bd81-dcc931c6ded1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResidentialMortgageBackedSecuritiesMember_d2929304-db76-49e5-988d-75a62bb1c54d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ResidentialMortgageBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_91f91c81-ed1e-448d-ba26-358c2ea57530" xlink:to="loc_us-gaap_ResidentialMortgageBackedSecuritiesMember_d2929304-db76-49e5-988d-75a62bb1c54d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignGovernmentDebtSecuritiesMember_30a02868-4e44-467b-bdad-dbcd60790f8f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ForeignGovernmentDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_91f91c81-ed1e-448d-ba26-358c2ea57530" xlink:to="loc_us-gaap_ForeignGovernmentDebtSecuritiesMember_30a02868-4e44-467b-bdad-dbcd60790f8f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentsMember_6078da0c-4730-484a-91d8-7a2f9955c45e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityMethodInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_91f91c81-ed1e-448d-ba26-358c2ea57530" xlink:to="loc_us-gaap_EquityMethodInvestmentsMember_6078da0c-4730-484a-91d8-7a2f9955c45e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockMember_ea443258-1174-4d6d-9d3d-47173b669eb7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_91f91c81-ed1e-448d-ba26-358c2ea57530" xlink:to="loc_us-gaap_PreferredStockMember_ea443258-1174-4d6d-9d3d-47173b669eb7" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesMember_2f51a497-2be5-455d-92b7-4979df8aad45" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquitySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_91f91c81-ed1e-448d-ba26-358c2ea57530" xlink:to="loc_us-gaap_EquitySecuritiesMember_2f51a497-2be5-455d-92b7-4979df8aad45" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_EmbeddedDerivativeOtherLongTermInvestmentsAvailableForSaleMember_0292278d-5d8b-4183-b047-6ad4362af6b3" xlink:href="fnf-20231231.xsd#fnf_EmbeddedDerivativeOtherLongTermInvestmentsAvailableForSaleMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_91f91c81-ed1e-448d-ba26-358c2ea57530" xlink:to="loc_fnf_EmbeddedDerivativeOtherLongTermInvestmentsAvailableForSaleMember_0292278d-5d8b-4183-b047-6ad4362af6b3" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_MarketRiskBenefitAssetMember_c9ca6f49-e4ba-4aa1-ac59-1884a3f4491a" xlink:href="fnf-20231231.xsd#fnf_MarketRiskBenefitAssetMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_91f91c81-ed1e-448d-ba26-358c2ea57530" xlink:to="loc_fnf_MarketRiskBenefitAssetMember_c9ca6f49-e4ba-4aa1-ac59-1884a3f4491a" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_MarketRiskBenefitLiabilityMember_596468eb-3a2f-40b9-a7bd-1b76c17f9a50" xlink:href="fnf-20231231.xsd#fnf_MarketRiskBenefitLiabilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_91f91c81-ed1e-448d-ba26-358c2ea57530" xlink:to="loc_fnf_MarketRiskBenefitLiabilityMember_596468eb-3a2f-40b9-a7bd-1b76c17f9a50" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_93a18b2f-7e5e-4739-8d98-40a75cb7a7a0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_65a40c42-2fbd-4172-8556-2ab296aafbc3" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_93a18b2f-7e5e-4739-8d98-40a75cb7a7a0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_93a18b2f-7e5e-4739-8d98-40a75cb7a7a0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_93a18b2f-7e5e-4739-8d98-40a75cb7a7a0" xlink:to="loc_us-gaap_RelatedPartyDomain_93a18b2f-7e5e-4739-8d98-40a75cb7a7a0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_f0bc4f62-a7af-487e-8c18-df882c8a1160" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_93a18b2f-7e5e-4739-8d98-40a75cb7a7a0" xlink:to="loc_us-gaap_RelatedPartyDomain_f0bc4f62-a7af-487e-8c18-df882c8a1160" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_AffiliatedEntityMember_a0beb870-666e-4b58-887b-1b48df12e010" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_AffiliatedEntityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_f0bc4f62-a7af-487e-8c18-df882c8a1160" xlink:to="loc_srt_AffiliatedEntityMember_a0beb870-666e-4b58-887b-1b48df12e010" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_bded2d00-da26-48ba-b214-dee84ab99679" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_65a40c42-2fbd-4172-8556-2ab296aafbc3" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_bded2d00-da26-48ba-b214-dee84ab99679" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_bded2d00-da26-48ba-b214-dee84ab99679_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_bded2d00-da26-48ba-b214-dee84ab99679" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_bded2d00-da26-48ba-b214-dee84ab99679_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_baf43c00-454c-4c6b-829a-d85aa52ff83a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_bded2d00-da26-48ba-b214-dee84ab99679" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_baf43c00-454c-4c6b-829a-d85aa52ff83a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FixedAnnuityIULEmbeddedDerivativesLiabilitiesInContractHolderFundsMember_7f95258e-e713-46ee-922b-57379e11e665" xlink:href="fnf-20231231.xsd#fnf_FixedAnnuityIULEmbeddedDerivativesLiabilitiesInContractHolderFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_baf43c00-454c-4c6b-829a-d85aa52ff83a" xlink:to="loc_fnf_FixedAnnuityIULEmbeddedDerivativesLiabilitiesInContractHolderFundsMember_7f95258e-e713-46ee-922b-57379e11e665" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueAxis_8a64aeb6-f60f-4618-892f-1d6122dd36fa" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ValuationTechniqueAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_65a40c42-2fbd-4172-8556-2ab296aafbc3" xlink:to="loc_us-gaap_ValuationTechniqueAxis_8a64aeb6-f60f-4618-892f-1d6122dd36fa" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueDomain_8a64aeb6-f60f-4618-892f-1d6122dd36fa_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ValuationTechniqueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ValuationTechniqueAxis_8a64aeb6-f60f-4618-892f-1d6122dd36fa" xlink:to="loc_us-gaap_ValuationTechniqueDomain_8a64aeb6-f60f-4618-892f-1d6122dd36fa_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueDomain_e69f185d-fc54-45b8-a270-0fa051ab749a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ValuationTechniqueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ValuationTechniqueAxis_8a64aeb6-f60f-4618-892f-1d6122dd36fa" xlink:to="loc_us-gaap_ValuationTechniqueDomain_e69f185d-fc54-45b8-a270-0fa051ab749a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_ThirdPartyValuationTechniqueMember_8db7d4ac-cf45-4aaa-b221-4c5dae95d86f" xlink:href="fnf-20231231.xsd#fnf_ThirdPartyValuationTechniqueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationTechniqueDomain_e69f185d-fc54-45b8-a270-0fa051ab749a" xlink:to="loc_fnf_ThirdPartyValuationTechniqueMember_8db7d4ac-cf45-4aaa-b221-4c5dae95d86f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueDiscountedCashFlowMember_7f28fa67-1231-4dcf-a809-8c75f70fe947" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ValuationTechniqueDiscountedCashFlowMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationTechniqueDomain_e69f185d-fc54-45b8-a270-0fa051ab749a" xlink:to="loc_us-gaap_ValuationTechniqueDiscountedCashFlowMember_7f28fa67-1231-4dcf-a809-8c75f70fe947" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketApproachValuationTechniqueMember_7ebb63ef-71de-42f4-9e2b-b24ee5640dbf" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MarketApproachValuationTechniqueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationTechniqueDomain_e69f185d-fc54-45b8-a270-0fa051ab749a" xlink:to="loc_us-gaap_MarketApproachValuationTechniqueMember_7ebb63ef-71de-42f4-9e2b-b24ee5640dbf" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_BlackScholesModelMember_672a164a-7d7e-45f3-9766-27073449fe86" xlink:href="fnf-20231231.xsd#fnf_BlackScholesModelMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationTechniqueDomain_e69f185d-fc54-45b8-a270-0fa051ab749a" xlink:to="loc_fnf_BlackScholesModelMember_672a164a-7d7e-45f3-9766-27073449fe86" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeAxis_f78f5fea-882d-4059-9a24-8f43bd96f2a6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MeasurementInputTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_65a40c42-2fbd-4172-8556-2ab296aafbc3" xlink:to="loc_us-gaap_MeasurementInputTypeAxis_f78f5fea-882d-4059-9a24-8f43bd96f2a6" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_f78f5fea-882d-4059-9a24-8f43bd96f2a6_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_f78f5fea-882d-4059-9a24-8f43bd96f2a6" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_f78f5fea-882d-4059-9a24-8f43bd96f2a6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputTypeDomain_404021b1-ed9c-429f-b3fa-68709c4c6563" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MeasurementInputTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_MeasurementInputTypeAxis_f78f5fea-882d-4059-9a24-8f43bd96f2a6" xlink:to="loc_us-gaap_MeasurementInputTypeDomain_404021b1-ed9c-429f-b3fa-68709c4c6563" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputDiscountRateMember_05b3c356-64ee-42c8-a8cb-a5b76e482f7c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MeasurementInputDiscountRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_404021b1-ed9c-429f-b3fa-68709c4c6563" xlink:to="loc_us-gaap_MeasurementInputDiscountRateMember_05b3c356-64ee-42c8-a8cb-a5b76e482f7c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputEbitdaMultipleMember_6d7862a0-895c-4d5b-a277-50aea040d30b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MeasurementInputEbitdaMultipleMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_404021b1-ed9c-429f-b3fa-68709c4c6563" xlink:to="loc_us-gaap_MeasurementInputEbitdaMultipleMember_6d7862a0-895c-4d5b-a277-50aea040d30b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_MeasurementInputTypeMarketValueOfFundMember_06699118-577e-415b-a0c0-0b77e6252558" xlink:href="fnf-20231231.xsd#fnf_MeasurementInputTypeMarketValueOfFundMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_404021b1-ed9c-429f-b3fa-68709c4c6563" xlink:to="loc_fnf_MeasurementInputTypeMarketValueOfFundMember_06699118-577e-415b-a0c0-0b77e6252558" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputMortalityRateMember_c7728c91-8034-4583-a998-ebc1f43056a0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MeasurementInputMortalityRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_404021b1-ed9c-429f-b3fa-68709c4c6563" xlink:to="loc_us-gaap_MeasurementInputMortalityRateMember_c7728c91-8034-4583-a998-ebc1f43056a0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_MeasurementInputSurrenderRatesMember_5914d782-8c25-4271-8e97-d059968fbee5" xlink:href="fnf-20231231.xsd#fnf_MeasurementInputSurrenderRatesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_404021b1-ed9c-429f-b3fa-68709c4c6563" xlink:to="loc_fnf_MeasurementInputSurrenderRatesMember_5914d782-8c25-4271-8e97-d059968fbee5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_MeasurementInputPartialWithdrawalsMember_6341c81b-40f2-4dc5-823f-202de0490571" xlink:href="fnf-20231231.xsd#fnf_MeasurementInputPartialWithdrawalsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_404021b1-ed9c-429f-b3fa-68709c4c6563" xlink:to="loc_fnf_MeasurementInputPartialWithdrawalsMember_6341c81b-40f2-4dc5-823f-202de0490571" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_MeasurementInputNonPerformanceSpreadMember_9830426b-a59a-4590-bcb9-a0fef7df9846" xlink:href="fnf-20231231.xsd#fnf_MeasurementInputNonPerformanceSpreadMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_404021b1-ed9c-429f-b3fa-68709c4c6563" xlink:to="loc_fnf_MeasurementInputNonPerformanceSpreadMember_9830426b-a59a-4590-bcb9-a0fef7df9846" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_MeasurementInputGMWBUtilizationMember_97a14524-5105-45ec-a397-67a9ccfb3157" xlink:href="fnf-20231231.xsd#fnf_MeasurementInputGMWBUtilizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_404021b1-ed9c-429f-b3fa-68709c4c6563" xlink:to="loc_fnf_MeasurementInputGMWBUtilizationMember_97a14524-5105-45ec-a397-67a9ccfb3157" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_MeasurementInputMarketValueOfOptionMember_13808b4a-339e-4135-b7d6-cb91b1077c6b" xlink:href="fnf-20231231.xsd#fnf_MeasurementInputMarketValueOfOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_404021b1-ed9c-429f-b3fa-68709c4c6563" xlink:to="loc_fnf_MeasurementInputMarketValueOfOptionMember_13808b4a-339e-4135-b7d6-cb91b1077c6b" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_MeasurementInputMortalityMultiplierMember_b29c4257-67e0-497e-84a7-f00e5d7b3ce7" xlink:href="fnf-20231231.xsd#fnf_MeasurementInputMortalityMultiplierMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_404021b1-ed9c-429f-b3fa-68709c4c6563" xlink:to="loc_fnf_MeasurementInputMortalityMultiplierMember_b29c4257-67e0-497e-84a7-f00e5d7b3ce7" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_MeasurementInputOptionCostMember_a52b0fcd-0171-459f-95fb-0adc2e79dd7c" xlink:href="fnf-20231231.xsd#fnf_MeasurementInputOptionCostMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_404021b1-ed9c-429f-b3fa-68709c4c6563" xlink:to="loc_fnf_MeasurementInputOptionCostMember_a52b0fcd-0171-459f-95fb-0adc2e79dd7c" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_MeasurementInputSwapRateMember_3c3f1934-62e3-4783-954a-214fed85bd73" xlink:href="fnf-20231231.xsd#fnf_MeasurementInputSwapRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_404021b1-ed9c-429f-b3fa-68709c4c6563" xlink:to="loc_fnf_MeasurementInputSwapRateMember_3c3f1934-62e3-4783-954a-214fed85bd73" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MeasurementInputQuotedPriceMember_0ba0b634-8666-478a-a1b9-92664f254404" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MeasurementInputQuotedPriceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MeasurementInputTypeDomain_404021b1-ed9c-429f-b3fa-68709c4c6563" xlink:to="loc_us-gaap_MeasurementInputQuotedPriceMember_0ba0b634-8666-478a-a1b9-92664f254404" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_ac2f486c-69af-462c-8ca0-a17a7767292d" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_65a40c42-2fbd-4172-8556-2ab296aafbc3" xlink:to="loc_srt_RangeAxis_ac2f486c-69af-462c-8ca0-a17a7767292d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_ac2f486c-69af-462c-8ca0-a17a7767292d_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_ac2f486c-69af-462c-8ca0-a17a7767292d" xlink:to="loc_srt_RangeMember_ac2f486c-69af-462c-8ca0-a17a7767292d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_ae6fecfc-79ac-4917-9935-aaf1fefaea9c" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_ac2f486c-69af-462c-8ca0-a17a7767292d" xlink:to="loc_srt_RangeMember_ae6fecfc-79ac-4917-9935-aaf1fefaea9c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_9d5c699b-c8e3-4a9b-9f0b-b9c9fc42491a" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_ae6fecfc-79ac-4917-9935-aaf1fefaea9c" xlink:to="loc_srt_MinimumMember_9d5c699b-c8e3-4a9b-9f0b-b9c9fc42491a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_662e110a-1f36-4152-a97e-2325ea5b8e5c" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_ae6fecfc-79ac-4917-9935-aaf1fefaea9c" xlink:to="loc_srt_MaximumMember_662e110a-1f36-4152-a97e-2325ea5b8e5c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_WeightedAverageMember_e098d8e9-775b-4872-ab4d-c212b248a2fe" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_WeightedAverageMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_ae6fecfc-79ac-4917-9935-aaf1fefaea9c" xlink:to="loc_srt_WeightedAverageMember_e098d8e9-775b-4872-ab4d-c212b248a2fe" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_03b2e830-e045-49e4-9eda-f832bb1227a0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AssetsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_5e29e62c-b837-4d26-9014-086158ccd226" xlink:to="loc_us-gaap_AssetsFairValueDisclosure_03b2e830-e045-49e4-9eda-f832bb1227a0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesFairValueDisclosure_b6eceb3a-d619-4be6-bade-e0a58d16d3a8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilitiesFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_5e29e62c-b837-4d26-9014-086158ccd226" xlink:to="loc_us-gaap_LiabilitiesFairValueDisclosure_b6eceb3a-d619-4be6-bade-e0a58d16d3a8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleMeasurementInput_ed64cc62-57c2-4bd4-b730-135b8f59d086" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesAvailableForSaleMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_5e29e62c-b837-4d26-9014-086158ccd226" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleMeasurementInput_ed64cc62-57c2-4bd4-b730-135b8f59d086" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNiMeasurementInput_fa017a7e-432d-4426-9523-f99521b92bdb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquitySecuritiesFvNiMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_5e29e62c-b837-4d26-9014-086158ccd226" xlink:to="loc_us-gaap_EquitySecuritiesFvNiMeasurementInput_fa017a7e-432d-4426-9523-f99521b92bdb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmbeddedDerivativeAssetMeasurementInput_08f63b3b-1760-4125-bf90-9eaf5b5b23f7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EmbeddedDerivativeAssetMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_5e29e62c-b837-4d26-9014-086158ccd226" xlink:to="loc_us-gaap_EmbeddedDerivativeAssetMeasurementInput_08f63b3b-1760-4125-bf90-9eaf5b5b23f7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_InvestmentInAffiliateMeasurementInput_668c3511-ae74-4a98-8186-64fc49f2ddcc" xlink:href="fnf-20231231.xsd#fnf_InvestmentInAffiliateMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_5e29e62c-b837-4d26-9014-086158ccd226" xlink:to="loc_fnf_InvestmentInAffiliateMeasurementInput_668c3511-ae74-4a98-8186-64fc49f2ddcc" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketRiskBenefitMeasurementInput_df44c252-229c-4ef9-a1c5-e3f578ce40a7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MarketRiskBenefitMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_5e29e62c-b837-4d26-9014-086158ccd226" xlink:to="loc_us-gaap_MarketRiskBenefitMeasurementInput_df44c252-229c-4ef9-a1c5-e3f578ce40a7" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmbeddedDerivativeLiabilityMeasurementInput_7cc708bc-2577-4ad0-bd50-254024b6d0a4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EmbeddedDerivativeLiabilityMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_5e29e62c-b837-4d26-9014-086158ccd226" xlink:to="loc_us-gaap_EmbeddedDerivativeLiabilityMeasurementInput_7cc708bc-2577-4ad0-bd50-254024b6d0a4" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_EquityMethodInvestmentMeasurementInput_58ee70cd-b9b3-4fe2-a92a-72d7ee691532" xlink:href="fnf-20231231.xsd#fnf_EquityMethodInvestmentMeasurementInput"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_5e29e62c-b837-4d26-9014-086158ccd226" xlink:to="loc_fnf_EquityMethodInvestmentMeasurementInput_58ee70cd-b9b3-4fe2-a92a-72d7ee691532" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/FairValueofFinancialInstrumentsChangestoFairValueofFinancialInstrumentsLevel3Detail" xlink:type="simple" xlink:href="fnf-20231231.xsd#FairValueofFinancialInstrumentsChangestoFairValueofFinancialInstrumentsLevel3Detail"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/FairValueofFinancialInstrumentsChangestoFairValueofFinancialInstrumentsLevel3Detail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_775bd788-5550-4f09-9b30-3e27da431885" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_faa377d5-7b75-45d4-b700-7f7f4be2323c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_775bd788-5550-4f09-9b30-3e27da431885" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_faa377d5-7b75-45d4-b700-7f7f4be2323c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_7e2a25ea-92d2-495f-9048-dea0275fcee5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_faa377d5-7b75-45d4-b700-7f7f4be2323c" xlink:to="loc_us-gaap_FinancialInstrumentAxis_7e2a25ea-92d2-495f-9048-dea0275fcee5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7e2a25ea-92d2-495f-9048-dea0275fcee5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_7e2a25ea-92d2-495f-9048-dea0275fcee5" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_7e2a25ea-92d2-495f-9048-dea0275fcee5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_96b2d18b-8345-4a3f-bdd7-70304aa19287" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_7e2a25ea-92d2-495f-9048-dea0275fcee5" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_96b2d18b-8345-4a3f-bdd7-70304aa19287" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_e3e3a2ba-cef5-4d53-b9f1-41775eefbe26" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AssetBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_96b2d18b-8345-4a3f-bdd7-70304aa19287" xlink:to="loc_us-gaap_AssetBackedSecuritiesMember_e3e3a2ba-cef5-4d53-b9f1-41775eefbe26" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialMortgageBackedSecuritiesMember_aab74dbc-ec39-4e9e-8c0c-c425be27739f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommercialMortgageBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_96b2d18b-8345-4a3f-bdd7-70304aa19287" xlink:to="loc_us-gaap_CommercialMortgageBackedSecuritiesMember_aab74dbc-ec39-4e9e-8c0c-c425be27739f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_62af37bb-0602-4dfd-b4a7-69e632d568a3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_96b2d18b-8345-4a3f-bdd7-70304aa19287" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_62af37bb-0602-4dfd-b4a7-69e632d568a3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_HybridsMember_54590573-321b-4b8b-ac41-51dda29cfad0" xlink:href="fnf-20231231.xsd#fnf_HybridsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_96b2d18b-8345-4a3f-bdd7-70304aa19287" xlink:to="loc_fnf_HybridsMember_54590573-321b-4b8b-ac41-51dda29cfad0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USStatesAndPoliticalSubdivisionsMember_1b8d407b-f905-4724-bab5-6e8847ca4976" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_USStatesAndPoliticalSubdivisionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_96b2d18b-8345-4a3f-bdd7-70304aa19287" xlink:to="loc_us-gaap_USStatesAndPoliticalSubdivisionsMember_1b8d407b-f905-4724-bab5-6e8847ca4976" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResidentialMortgageBackedSecuritiesMember_848449fa-dd0e-46b0-b314-65e5f247732a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ResidentialMortgageBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_96b2d18b-8345-4a3f-bdd7-70304aa19287" xlink:to="loc_us-gaap_ResidentialMortgageBackedSecuritiesMember_848449fa-dd0e-46b0-b314-65e5f247732a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignGovernmentDebtSecuritiesMember_8c0e06aa-178b-4811-a352-ce8586be845f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ForeignGovernmentDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_96b2d18b-8345-4a3f-bdd7-70304aa19287" xlink:to="loc_us-gaap_ForeignGovernmentDebtSecuritiesMember_8c0e06aa-178b-4811-a352-ce8586be845f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentsMember_c19bd74b-dddd-4eb2-a3b4-4d033a7ce879" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityMethodInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_96b2d18b-8345-4a3f-bdd7-70304aa19287" xlink:to="loc_us-gaap_EquityMethodInvestmentsMember_c19bd74b-dddd-4eb2-a3b4-4d033a7ce879" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermInvestmentsMember_38648716-0fb5-474b-aa9c-a0c5e75abc17" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShortTermInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_96b2d18b-8345-4a3f-bdd7-70304aa19287" xlink:to="loc_us-gaap_ShortTermInvestmentsMember_38648716-0fb5-474b-aa9c-a0c5e75abc17" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockMember_659dd487-47c6-4047-a785-18447e791603" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_96b2d18b-8345-4a3f-bdd7-70304aa19287" xlink:to="loc_us-gaap_PreferredStockMember_659dd487-47c6-4047-a785-18447e791603" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesMember_941b7054-04bb-42de-a61c-64131e1b6632" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquitySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_96b2d18b-8345-4a3f-bdd7-70304aa19287" xlink:to="loc_us-gaap_EquitySecuritiesMember_941b7054-04bb-42de-a61c-64131e1b6632" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_AvailableForSaleEmbeddedDerivativesMember_b8af49a3-64c6-4408-a017-ab55b0365efa" xlink:href="fnf-20231231.xsd#fnf_AvailableForSaleEmbeddedDerivativesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_96b2d18b-8345-4a3f-bdd7-70304aa19287" xlink:to="loc_fnf_AvailableForSaleEmbeddedDerivativesMember_b8af49a3-64c6-4408-a017-ab55b0365efa" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_CreditLinkedNoteMember_bbb4d315-b177-4d19-ba01-155ca48ff29c" xlink:href="fnf-20231231.xsd#fnf_CreditLinkedNoteMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_96b2d18b-8345-4a3f-bdd7-70304aa19287" xlink:to="loc_fnf_CreditLinkedNoteMember_bbb4d315-b177-4d19-ba01-155ca48ff29c" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_SecuredBorrowingReceivableMember_de0f9420-876d-40db-8a0a-e7772aa82abd" xlink:href="fnf-20231231.xsd#fnf_SecuredBorrowingReceivableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_96b2d18b-8345-4a3f-bdd7-70304aa19287" xlink:to="loc_fnf_SecuredBorrowingReceivableMember_de0f9420-876d-40db-8a0a-e7772aa82abd" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_TotalAssetsAtFairValueBeforeMarketRiskBenefitAssetMember_f0bd94cd-bad0-4eac-a21a-4fc28a228f0f" xlink:href="fnf-20231231.xsd#fnf_TotalAssetsAtFairValueBeforeMarketRiskBenefitAssetMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_96b2d18b-8345-4a3f-bdd7-70304aa19287" xlink:to="loc_fnf_TotalAssetsAtFairValueBeforeMarketRiskBenefitAssetMember_f0bd94cd-bad0-4eac-a21a-4fc28a228f0f" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_MarketRiskBenefitAssetMember_390cd345-333b-4cef-a9c8-25751b027ecc" xlink:href="fnf-20231231.xsd#fnf_MarketRiskBenefitAssetMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_96b2d18b-8345-4a3f-bdd7-70304aa19287" xlink:to="loc_fnf_MarketRiskBenefitAssetMember_390cd345-333b-4cef-a9c8-25751b027ecc" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_TotalLiabilitiesBeforeMarketRiskBenefitMember_a3e3d6ee-dc75-4336-824d-9020af819c50" xlink:href="fnf-20231231.xsd#fnf_TotalLiabilitiesBeforeMarketRiskBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_96b2d18b-8345-4a3f-bdd7-70304aa19287" xlink:to="loc_fnf_TotalLiabilitiesBeforeMarketRiskBenefitMember_a3e3d6ee-dc75-4336-824d-9020af819c50" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_MarketRiskBenefitLiabilityMember_b02d01d2-0e21-44aa-82a4-cf570dff79ba" xlink:href="fnf-20231231.xsd#fnf_MarketRiskBenefitLiabilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_96b2d18b-8345-4a3f-bdd7-70304aa19287" xlink:to="loc_fnf_MarketRiskBenefitLiabilityMember_b02d01d2-0e21-44aa-82a4-cf570dff79ba" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByAssetClassAxis_1cd8d38f-91f1-4dad-8d75-d55b3aad91a7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueByAssetClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_faa377d5-7b75-45d4-b700-7f7f4be2323c" xlink:to="loc_us-gaap_FairValueByAssetClassAxis_1cd8d38f-91f1-4dad-8d75-d55b3aad91a7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_1cd8d38f-91f1-4dad-8d75-d55b3aad91a7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_1cd8d38f-91f1-4dad-8d75-d55b3aad91a7" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_1cd8d38f-91f1-4dad-8d75-d55b3aad91a7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_0ce5c3d0-254c-4a5b-8415-458d7bb7193d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByAssetClassAxis_1cd8d38f-91f1-4dad-8d75-d55b3aad91a7" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_0ce5c3d0-254c-4a5b-8415-458d7bb7193d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_DerivativeInstrumentsMember_11251e6d-2e58-44b8-9b39-a5880cfb7026" xlink:href="fnf-20231231.xsd#fnf_DerivativeInstrumentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_0ce5c3d0-254c-4a5b-8415-458d7bb7193d" xlink:to="loc_fnf_DerivativeInstrumentsMember_11251e6d-2e58-44b8-9b39-a5880cfb7026" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByLiabilityClassAxis_7b9a2c6a-d3eb-4cd6-b783-45537850bdbc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueByLiabilityClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_faa377d5-7b75-45d4-b700-7f7f4be2323c" xlink:to="loc_us-gaap_FairValueByLiabilityClassAxis_7b9a2c6a-d3eb-4cd6-b783-45537850bdbc" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_7b9a2c6a-d3eb-4cd6-b783-45537850bdbc_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_7b9a2c6a-d3eb-4cd6-b783-45537850bdbc" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_7b9a2c6a-d3eb-4cd6-b783-45537850bdbc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_dcc75464-8e1d-4be8-a1dc-ff31bcf53370" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_7b9a2c6a-d3eb-4cd6-b783-45537850bdbc" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_dcc75464-8e1d-4be8-a1dc-ff31bcf53370" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FixedAnnuityIULEmbeddedDerivativesLiabilitiesInContractHolderFundsMember_4a74a97d-0779-4e15-a002-6ac782cc2069" xlink:href="fnf-20231231.xsd#fnf_FixedAnnuityIULEmbeddedDerivativesLiabilitiesInContractHolderFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_dcc75464-8e1d-4be8-a1dc-ff31bcf53370" xlink:to="loc_fnf_FixedAnnuityIULEmbeddedDerivativesLiabilitiesInContractHolderFundsMember_4a74a97d-0779-4e15-a002-6ac782cc2069" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_6c8f1d8a-1169-484c-9dd7-84a14903887a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_faa377d5-7b75-45d4-b700-7f7f4be2323c" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_6c8f1d8a-1169-484c-9dd7-84a14903887a" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_6c8f1d8a-1169-484c-9dd7-84a14903887a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_6c8f1d8a-1169-484c-9dd7-84a14903887a" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_6c8f1d8a-1169-484c-9dd7-84a14903887a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_ae9388b5-9e25-4e31-bbb9-0bb9529dc8e3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_6c8f1d8a-1169-484c-9dd7-84a14903887a" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_ae9388b5-9e25-4e31-bbb9-0bb9529dc8e3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_2a6564d9-032e-45d6-b2af-2c15225901b9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_ae9388b5-9e25-4e31-bbb9-0bb9529dc8e3" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_2a6564d9-032e-45d6-b2af-2c15225901b9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_0d4f5ffc-9caa-4a3d-9924-876ded96f99b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_775bd788-5550-4f09-9b30-3e27da431885" xlink:to="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_0d4f5ffc-9caa-4a3d-9924-876ded96f99b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosureAbstract_e529d71d-82db-423a-bfb4-bfcfa28f7459" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AssetsFairValueDisclosureAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_0d4f5ffc-9caa-4a3d-9924-876ded96f99b" xlink:to="loc_us-gaap_AssetsFairValueDisclosureAbstract_e529d71d-82db-423a-bfb4-bfcfa28f7459" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesAbstract_bf8c73bc-1a6a-45b0-bce3-a150a63ba786" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AvailableForSaleSecuritiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_e529d71d-82db-423a-bfb4-bfcfa28f7459" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesAbstract_bf8c73bc-1a6a-45b0-bce3-a150a63ba786" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_850c1fe5-8da0-467b-8b0a-ff0b51b236f9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesAbstract_bf8c73bc-1a6a-45b0-bce3-a150a63ba786" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_850c1fe5-8da0-467b-8b0a-ff0b51b236f9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1_4039d727-5821-42e7-8c61-d9dd15595785" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesAbstract_bf8c73bc-1a6a-45b0-bce3-a150a63ba786" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1_4039d727-5821-42e7-8c61-d9dd15595785" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss_9043a525-c801-4b2c-9cef-6f0fbdb9ff12" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesAbstract_bf8c73bc-1a6a-45b0-bce3-a150a63ba786" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss_9043a525-c801-4b2c-9cef-6f0fbdb9ff12" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases_f459cc8a-012c-4cc3-a823-967b8dd8aa31" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesAbstract_bf8c73bc-1a6a-45b0-bce3-a150a63ba786" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases_f459cc8a-012c-4cc3-a823-967b8dd8aa31" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales_7a3a44cd-99ed-4357-8801-8c32c5ab914e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesAbstract_bf8c73bc-1a6a-45b0-bce3-a150a63ba786" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales_7a3a44cd-99ed-4357-8801-8c32c5ab914e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements_e238efdb-e637-48fb-85d6-128f10beb685" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesAbstract_bf8c73bc-1a6a-45b0-bce3-a150a63ba786" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements_e238efdb-e637-48fb-85d6-128f10beb685" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet_952987b8-97bb-4f50-ab26-0abc103fe9c2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesAbstract_bf8c73bc-1a6a-45b0-bce3-a150a63ba786" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet_952987b8-97bb-4f50-ab26-0abc103fe9c2" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_1af9fcaf-d6ad-4903-8eb9-fe510d2ab352" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetRecurringBasisStillHeldUnrealizedGainLossOci_d14b5497-9813-4992-b66b-1fcbd99843f3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetRecurringBasisStillHeldUnrealizedGainLossOci"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_e529d71d-82db-423a-bfb4-bfcfa28f7459" xlink:to="loc_us-gaap_FairValueAssetRecurringBasisStillHeldUnrealizedGainLossOci_d14b5497-9813-4992-b66b-1fcbd99843f3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_d510d533-4a3e-4476-a8e0-00ff9f0e031d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilitiesFairValueDisclosureAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_0d4f5ffc-9caa-4a3d-9924-876ded96f99b" xlink:to="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_d510d533-4a3e-4476-a8e0-00ff9f0e031d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_f4fc5d14-b85d-46b1-b602-307f665e978c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_d510d533-4a3e-4476-a8e0-00ff9f0e031d" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_f4fc5d14-b85d-46b1-b602-307f665e978c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_967bcf0a-8e55-4935-b69d-95466a4ccc0a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_d510d533-4a3e-4476-a8e0-00ff9f0e031d" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings_967bcf0a-8e55-4935-b69d-95466a4ccc0a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInOtherComprehensiveIncome_18558e07-6669-4674-8b86-10b9479661a4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInOtherComprehensiveIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_d510d533-4a3e-4476-a8e0-00ff9f0e031d" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInOtherComprehensiveIncome_18558e07-6669-4674-8b86-10b9479661a4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases_ee8019f6-6feb-4325-bbfb-3aef620ef250" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_d510d533-4a3e-4476-a8e0-00ff9f0e031d" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityPurchases_ee8019f6-6feb-4325-bbfb-3aef620ef250" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySales_c4205e80-2691-4336-a5b4-d1f7f1d94167" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySales"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_d510d533-4a3e-4476-a8e0-00ff9f0e031d" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySales_c4205e80-2691-4336-a5b4-d1f7f1d94167" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements_aca403ba-512c-4aa3-8081-45c1e1b9745f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_d510d533-4a3e-4476-a8e0-00ff9f0e031d" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements_aca403ba-512c-4aa3-8081-45c1e1b9745f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityTransfersNet_bbba184f-5bfb-4f30-8606-b3e61323371d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityTransfersNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_d510d533-4a3e-4476-a8e0-00ff9f0e031d" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityTransfersNet_bbba184f-5bfb-4f30-8606-b3e61323371d" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_254be8f3-279e-43fb-8ab0-a245733ef188" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilityRecurringBasisStillHeldUnrealizedGainLossOci_a9268246-e32c-46b2-9867-1ff87599ef98" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueLiabilityRecurringBasisStillHeldUnrealizedGainLossOci"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationCalculationRollForward_0d4f5ffc-9caa-4a3d-9924-876ded96f99b" xlink:to="loc_us-gaap_FairValueLiabilityRecurringBasisStillHeldUnrealizedGainLossOci_a9268246-e32c-46b2-9867-1ff87599ef98" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueRecurringBasisUnobservableInputReconciliationLiabilityGainLossStatementOfIncomeExtensibleList_4a6b0072-c470-4a5d-a703-ee62e529ae87" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueRecurringBasisUnobservableInputReconciliationLiabilityGainLossStatementOfIncomeExtensibleList"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_775bd788-5550-4f09-9b30-3e27da431885" xlink:to="loc_us-gaap_FairValueRecurringBasisUnobservableInputReconciliationLiabilityGainLossStatementOfIncomeExtensibleList_4a6b0072-c470-4a5d-a703-ee62e529ae87" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueRecurringBasisUnobservableInputReconciliationAssetGainLossStatementOfOtherComprehensiveIncomeExtensibleList_712808c1-8f38-4617-bd2c-3a01edfe89a9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueRecurringBasisUnobservableInputReconciliationAssetGainLossStatementOfOtherComprehensiveIncomeExtensibleList"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_775bd788-5550-4f09-9b30-3e27da431885" xlink:to="loc_us-gaap_FairValueRecurringBasisUnobservableInputReconciliationAssetGainLossStatementOfOtherComprehensiveIncomeExtensibleList_712808c1-8f38-4617-bd2c-3a01edfe89a9" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/FairValueofFinancialInstrumentsNarrativeDetail" xlink:type="simple" xlink:href="fnf-20231231.xsd#FairValueofFinancialInstrumentsNarrativeDetail"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/FairValueofFinancialInstrumentsNarrativeDetail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_01a7b068-699e-4482-bac4-5a22018f6624" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_fd4fa250-11d0-4a00-bb6f-5d6297bc033a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_01a7b068-699e-4482-bac4-5a22018f6624" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_fd4fa250-11d0-4a00-bb6f-5d6297bc033a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_0c0b2b1c-b297-4552-b958-d7a901affbc4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_fd4fa250-11d0-4a00-bb6f-5d6297bc033a" xlink:to="loc_us-gaap_FinancialInstrumentAxis_0c0b2b1c-b297-4552-b958-d7a901affbc4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_0c0b2b1c-b297-4552-b958-d7a901affbc4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_0c0b2b1c-b297-4552-b958-d7a901affbc4" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_0c0b2b1c-b297-4552-b958-d7a901affbc4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_5dabfdc9-c5ae-4101-8a51-7c953e895ffa" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_0c0b2b1c-b297-4552-b958-d7a901affbc4" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_5dabfdc9-c5ae-4101-8a51-7c953e895ffa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_CreditLinkedNoteMember_c74e3561-15db-41ec-868f-7b941b4b0d02" xlink:href="fnf-20231231.xsd#fnf_CreditLinkedNoteMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_5dabfdc9-c5ae-4101-8a51-7c953e895ffa" xlink:to="loc_fnf_CreditLinkedNoteMember_c74e3561-15db-41ec-868f-7b941b4b0d02" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueAxis_6254fe6c-7e55-41a5-a3e6-33b63fa76a58" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ValuationTechniqueAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_fd4fa250-11d0-4a00-bb6f-5d6297bc033a" xlink:to="loc_us-gaap_ValuationTechniqueAxis_6254fe6c-7e55-41a5-a3e6-33b63fa76a58" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueDomain_6254fe6c-7e55-41a5-a3e6-33b63fa76a58_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ValuationTechniqueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ValuationTechniqueAxis_6254fe6c-7e55-41a5-a3e6-33b63fa76a58" xlink:to="loc_us-gaap_ValuationTechniqueDomain_6254fe6c-7e55-41a5-a3e6-33b63fa76a58_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationTechniqueDomain_61ee6ac0-c090-4fc2-8857-5795cefa3cd2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ValuationTechniqueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ValuationTechniqueAxis_6254fe6c-7e55-41a5-a3e6-33b63fa76a58" xlink:to="loc_us-gaap_ValuationTechniqueDomain_61ee6ac0-c090-4fc2-8857-5795cefa3cd2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeApproachValuationTechniqueMember_d77623cd-06a5-4994-b37c-6dffe8cac2d8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeApproachValuationTechniqueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationTechniqueDomain_61ee6ac0-c090-4fc2-8857-5795cefa3cd2" xlink:to="loc_us-gaap_IncomeApproachValuationTechniqueMember_d77623cd-06a5-4994-b37c-6dffe8cac2d8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_932c2964-65eb-4cdd-be4a-aadc2621de2e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_fd4fa250-11d0-4a00-bb6f-5d6297bc033a" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_932c2964-65eb-4cdd-be4a-aadc2621de2e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_932c2964-65eb-4cdd-be4a-aadc2621de2e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_932c2964-65eb-4cdd-be4a-aadc2621de2e" xlink:to="loc_us-gaap_SegmentDomain_932c2964-65eb-4cdd-be4a-aadc2621de2e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_6a60a6fc-a246-4941-a885-dacc23ef16bf" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_932c2964-65eb-4cdd-be4a-aadc2621de2e" xlink:to="loc_us-gaap_SegmentDomain_6a60a6fc-a246-4941-a885-dacc23ef16bf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_TitleSegmentMember_0a552a86-88d7-4038-bfb4-c40f0131cae1" xlink:href="fnf-20231231.xsd#fnf_TitleSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_6a60a6fc-a246-4941-a885-dacc23ef16bf" xlink:to="loc_fnf_TitleSegmentMember_0a552a86-88d7-4038-bfb4-c40f0131cae1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativePriceRiskOptionStrikePrice_6a3bf5ac-b97d-4fdc-a53b-9b42e0d54ffe" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativePriceRiskOptionStrikePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_01a7b068-699e-4482-bac4-5a22018f6624" xlink:to="loc_us-gaap_DerivativePriceRiskOptionStrikePrice_6a3bf5ac-b97d-4fdc-a53b-9b42e0d54ffe" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestments_33cdc084-dbc3-4500-bfbd-a84c70355ad2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_01a7b068-699e-4482-bac4-5a22018f6624" xlink:to="loc_us-gaap_EquityMethodInvestments_33cdc084-dbc3-4500-bfbd-a84c70355ad2" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/FairValueofFinancialInstrumentsCarryingValueandEstimatedFairValueofFinancialInstrumentsDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#FairValueofFinancialInstrumentsCarryingValueandEstimatedFairValueofFinancialInstrumentsDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/FairValueofFinancialInstrumentsCarryingValueandEstimatedFairValueofFinancialInstrumentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_9b3a027b-b554-4ed7-b881-39c46d301468" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_87e0f416-d231-4387-a0d3-20887a57997e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_9b3a027b-b554-4ed7-b881-39c46d301468" xlink:to="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_87e0f416-d231-4387-a0d3-20887a57997e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_f1ed8c66-7e76-420b-9053-d3279f3b32c4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_87e0f416-d231-4387-a0d3-20887a57997e" xlink:to="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_f1ed8c66-7e76-420b-9053-d3279f3b32c4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_f1ed8c66-7e76-420b-9053-d3279f3b32c4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_f1ed8c66-7e76-420b-9053-d3279f3b32c4" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_f1ed8c66-7e76-420b-9053-d3279f3b32c4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_3fdd4b25-44b6-4780-be36-ecb348bf4d4f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByFairValueHierarchyLevelAxis_f1ed8c66-7e76-420b-9053-d3279f3b32c4" xlink:to="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_3fdd4b25-44b6-4780-be36-ecb348bf4d4f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel1Member_e5dce753-e838-440c-825b-fcd18eee25c6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueInputsLevel1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_3fdd4b25-44b6-4780-be36-ecb348bf4d4f" xlink:to="loc_us-gaap_FairValueInputsLevel1Member_e5dce753-e838-440c-825b-fcd18eee25c6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel2Member_8eb7777a-7051-4bcf-bb9c-8e487902115f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueInputsLevel2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_3fdd4b25-44b6-4780-be36-ecb348bf4d4f" xlink:to="loc_us-gaap_FairValueInputsLevel2Member_8eb7777a-7051-4bcf-bb9c-8e487902115f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueInputsLevel3Member_fc44a15f-f901-4ea1-a05d-0273be12d4f0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueInputsLevel3Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_3fdd4b25-44b6-4780-be36-ecb348bf4d4f" xlink:to="loc_us-gaap_FairValueInputsLevel3Member_fc44a15f-f901-4ea1-a05d-0273be12d4f0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember_f43c98ab-dda1-443f-8e55-a0a3600c060f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueMeasurementsFairValueHierarchyDomain_3fdd4b25-44b6-4780-be36-ecb348bf4d4f" xlink:to="loc_us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember_f43c98ab-dda1-443f-8e55-a0a3600c060f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_dee92e71-066f-4fc5-82ef-3fc2576e216a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_87e0f416-d231-4387-a0d3-20887a57997e" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_dee92e71-066f-4fc5-82ef-3fc2576e216a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_dee92e71-066f-4fc5-82ef-3fc2576e216a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_dee92e71-066f-4fc5-82ef-3fc2576e216a" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_dee92e71-066f-4fc5-82ef-3fc2576e216a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_6319d31a-085a-4407-addc-d52687c10a75" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_dee92e71-066f-4fc5-82ef-3fc2576e216a" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_6319d31a-085a-4407-addc-d52687c10a75" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_280882d3-9b02-4602-bdad-b10f8ff7e511" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_6319d31a-085a-4407-addc-d52687c10a75" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_280882d3-9b02-4602-bdad-b10f8ff7e511" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_9f9da59d-536a-4ec1-983c-033cfc37f424" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_280882d3-9b02-4602-bdad-b10f8ff7e511" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_9f9da59d-536a-4ec1-983c-033cfc37f424" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_a897a33e-8a43-4130-9e8e-0962af6659f9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CarryingReportedAmountFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_280882d3-9b02-4602-bdad-b10f8ff7e511" xlink:to="loc_us-gaap_CarryingReportedAmountFairValueDisclosureMember_a897a33e-8a43-4130-9e8e-0962af6659f9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosureAbstract_d5764dc9-a5aa-4372-979d-b95524da02f2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AssetsFairValueDisclosureAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_9b3a027b-b554-4ed7-b881-39c46d301468" xlink:to="loc_us-gaap_AssetsFairValueDisclosureAbstract_d5764dc9-a5aa-4372-979d-b95524da02f2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FHLBCommonStockFairValue_d8c72776-f1ef-4b43-b8ec-b0ae5acb9b0a" xlink:href="fnf-20231231.xsd#fnf_FHLBCommonStockFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_d5764dc9-a5aa-4372-979d-b95524da02f2" xlink:to="loc_fnf_FHLBCommonStockFairValue_d8c72776-f1ef-4b43-b8ec-b0ae5acb9b0a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_InvestmentsCommercialMortgageLoansFairValueDisclosure_8f9ee476-e0a9-447b-8e51-b03caf5d9a19" xlink:href="fnf-20231231.xsd#fnf_InvestmentsCommercialMortgageLoansFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_d5764dc9-a5aa-4372-979d-b95524da02f2" xlink:to="loc_fnf_InvestmentsCommercialMortgageLoansFairValueDisclosure_8f9ee476-e0a9-447b-8e51-b03caf5d9a19" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_InvestmentsResidentialMortgageLoansFairValueDisclosure_acd4ea12-b510-499f-8a49-946e72b1fd36" xlink:href="fnf-20231231.xsd#fnf_InvestmentsResidentialMortgageLoansFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_d5764dc9-a5aa-4372-979d-b95524da02f2" xlink:to="loc_fnf_InvestmentsResidentialMortgageLoansFairValueDisclosure_acd4ea12-b510-499f-8a49-946e72b1fd36" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestments_c87b06bb-d3b4-4377-bff2-2bb072ec4996" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_d5764dc9-a5aa-4372-979d-b95524da02f2" xlink:to="loc_us-gaap_EquityMethodInvestments_c87b06bb-d3b4-4377-bff2-2bb072ec4996" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_PolicyLoansFairValue_aed155e9-807d-46e8-9550-a325c069a048" xlink:href="fnf-20231231.xsd#fnf_PolicyLoansFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_d5764dc9-a5aa-4372-979d-b95524da02f2" xlink:to="loc_fnf_PolicyLoansFairValue_aed155e9-807d-46e8-9550-a325c069a048" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_InvestmentsAffiliatedBankLoanFairValueDisclosure_0f6bebf3-1b5f-4277-a1fb-eb45f518c108" xlink:href="fnf-20231231.xsd#fnf_InvestmentsAffiliatedBankLoanFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_d5764dc9-a5aa-4372-979d-b95524da02f2" xlink:to="loc_fnf_InvestmentsAffiliatedBankLoanFairValueDisclosure_0f6bebf3-1b5f-4277-a1fb-eb45f518c108" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LifeInsuranceCorporateOrBankOwnedAmount_d0dba2a4-aea9-4abb-997b-30532c0cb3b3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LifeInsuranceCorporateOrBankOwnedAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_d5764dc9-a5aa-4372-979d-b95524da02f2" xlink:to="loc_us-gaap_LifeInsuranceCorporateOrBankOwnedAmount_d0dba2a4-aea9-4abb-997b-30532c0cb3b3" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsAndNotesReceivableNet_09f64440-5c50-470e-ba76-d78abc3e5497" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccountsAndNotesReceivableNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_d5764dc9-a5aa-4372-979d-b95524da02f2" xlink:to="loc_us-gaap_AccountsAndNotesReceivableNet_09f64440-5c50-470e-ba76-d78abc3e5497" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_AssetscarriedonBalanceSheetatamountsotherthanfairvalue_c36046f6-3cbe-411d-b770-8773d84ac26d" xlink:href="fnf-20231231.xsd#fnf_AssetscarriedonBalanceSheetatamountsotherthanfairvalue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsFairValueDisclosureAbstract_d5764dc9-a5aa-4372-979d-b95524da02f2" xlink:to="loc_fnf_AssetscarriedonBalanceSheetatamountsotherthanfairvalue_c36046f6-3cbe-411d-b770-8773d84ac26d" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_e1cc8e01-bb74-4f09-bae4-d8e8b77ae0f3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilitiesFairValueDisclosureAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_9b3a027b-b554-4ed7-b881-39c46d301468" xlink:to="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_e1cc8e01-bb74-4f09-bae4-d8e8b77ae0f3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesRelatedToInvestmentContractsFairValueDisclosure_8d07f333-65f1-40c0-81e0-00ad69f69c8e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilitiesRelatedToInvestmentContractsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_e1cc8e01-bb74-4f09-bae4-d8e8b77ae0f3" xlink:to="loc_us-gaap_LiabilitiesRelatedToInvestmentContractsFairValueDisclosure_8d07f333-65f1-40c0-81e0-00ad69f69c8e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFairValue_a2364c86-08e7-48b2-891a-29faca4e9c39" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_e1cc8e01-bb74-4f09-bae4-d8e8b77ae0f3" xlink:to="loc_us-gaap_DebtInstrumentFairValue_a2364c86-08e7-48b2-891a-29faca4e9c39" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_LiabilitiescarriedonBalanceSheetatamountsotherthanfairvalue_14fcef4f-7e8d-40bc-babf-3323a8873c81" xlink:href="fnf-20231231.xsd#fnf_LiabilitiescarriedonBalanceSheetatamountsotherthanfairvalue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesFairValueDisclosureAbstract_e1cc8e01-bb74-4f09-bae4-d8e8b77ae0f3" xlink:to="loc_fnf_LiabilitiescarriedonBalanceSheetatamountsotherthanfairvalue_14fcef4f-7e8d-40bc-babf-3323a8873c81" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/InvestmentsConsolidatedInvestmentsDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#InvestmentsConsolidatedInvestmentsDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/InvestmentsConsolidatedInvestmentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfInvestmentsLineItems_080314d6-b8e4-4608-8c24-1295b0bd3dc3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfInvestmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfInvestmentsTable_12dfbb2f-084e-4b1c-bf95-bde47824dfca" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfInvestmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_080314d6-b8e4-4608-8c24-1295b0bd3dc3" xlink:to="loc_us-gaap_ScheduleOfInvestmentsTable_12dfbb2f-084e-4b1c-bf95-bde47824dfca" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_89c7b02f-0b80-4b58-b865-8e3c71d5157e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfInvestmentsTable_12dfbb2f-084e-4b1c-bf95-bde47824dfca" xlink:to="loc_us-gaap_FinancialInstrumentAxis_89c7b02f-0b80-4b58-b865-8e3c71d5157e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_89c7b02f-0b80-4b58-b865-8e3c71d5157e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_89c7b02f-0b80-4b58-b865-8e3c71d5157e" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_89c7b02f-0b80-4b58-b865-8e3c71d5157e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_96760c5e-4b71-4d10-af3f-67539ee75ccb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_89c7b02f-0b80-4b58-b865-8e3c71d5157e" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_96760c5e-4b71-4d10-af3f-67539ee75ccb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_32d064ca-7323-4139-8f8e-8da8871c5e11" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AssetBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_96760c5e-4b71-4d10-af3f-67539ee75ccb" xlink:to="loc_us-gaap_AssetBackedSecuritiesMember_32d064ca-7323-4139-8f8e-8da8871c5e11" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialMortgageBackedSecuritiesMember_6f5e5f21-2350-4b9c-a51a-f79d2d13f020" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommercialMortgageBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_96760c5e-4b71-4d10-af3f-67539ee75ccb" xlink:to="loc_us-gaap_CommercialMortgageBackedSecuritiesMember_6f5e5f21-2350-4b9c-a51a-f79d2d13f020" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_39f87af1-ba37-413c-88df-9d3fd8d0b6ee" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_96760c5e-4b71-4d10-af3f-67539ee75ccb" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_39f87af1-ba37-413c-88df-9d3fd8d0b6ee" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_HybridsMember_bdd724a4-c055-450b-ab34-e08353dcb5b1" xlink:href="fnf-20231231.xsd#fnf_HybridsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_96760c5e-4b71-4d10-af3f-67539ee75ccb" xlink:to="loc_fnf_HybridsMember_bdd724a4-c055-450b-ab34-e08353dcb5b1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_MunicipalsMember_c14a497b-8972-4047-a330-8137bb01465e" xlink:href="fnf-20231231.xsd#fnf_MunicipalsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_96760c5e-4b71-4d10-af3f-67539ee75ccb" xlink:to="loc_fnf_MunicipalsMember_c14a497b-8972-4047-a330-8137bb01465e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResidentialMortgageBackedSecuritiesMember_5311de6f-fa46-4ae9-b566-c235a3c23227" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ResidentialMortgageBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_96760c5e-4b71-4d10-af3f-67539ee75ccb" xlink:to="loc_us-gaap_ResidentialMortgageBackedSecuritiesMember_5311de6f-fa46-4ae9-b566-c235a3c23227" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_b0220b2e-5b1f-42a4-88f2-1eabce88dccf" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_USGovernmentAgenciesDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_96760c5e-4b71-4d10-af3f-67539ee75ccb" xlink:to="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_b0220b2e-5b1f-42a4-88f2-1eabce88dccf" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignGovernmentDebtSecuritiesMember_2d9b3aad-b379-4854-b963-a207fa5e0aae" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ForeignGovernmentDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_96760c5e-4b71-4d10-af3f-67539ee75ccb" xlink:to="loc_us-gaap_ForeignGovernmentDebtSecuritiesMember_2d9b3aad-b379-4854-b963-a207fa5e0aae" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesFairValueToAmortizedCostBasisAbstract_4a434371-e3f4-40ec-b6ea-94a14a7bf9f2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AvailableForSaleSecuritiesFairValueToAmortizedCostBasisAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_080314d6-b8e4-4608-8c24-1295b0bd3dc3" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesFairValueToAmortizedCostBasisAbstract_4a434371-e3f4-40ec-b6ea-94a14a7bf9f2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss_3cd17ccb-8652-4600-bffd-f3c3411a8379" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesFairValueToAmortizedCostBasisAbstract_4a434371-e3f4-40ec-b6ea-94a14a7bf9f2" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss_3cd17ccb-8652-4600-bffd-f3c3411a8379" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest_c8a6018f-847b-42b6-a961-df5e1cdd202d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesFairValueToAmortizedCostBasisAbstract_4a434371-e3f4-40ec-b6ea-94a14a7bf9f2" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest_c8a6018f-847b-42b6-a961-df5e1cdd202d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_cafc12c9-440c-4c2e-ac15-55aa40b00593" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesFairValueToAmortizedCostBasisAbstract_4a434371-e3f4-40ec-b6ea-94a14a7bf9f2" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax_cafc12c9-440c-4c2e-ac15-55aa40b00593" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_0fe40fc0-049a-4fea-b73f-d02714a88dd1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesFairValueToAmortizedCostBasisAbstract_4a434371-e3f4-40ec-b6ea-94a14a7bf9f2" xlink:to="loc_us-gaap_AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax_0fe40fc0-049a-4fea-b73f-d02714a88dd1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_bd1b9801-ca8e-4b7c-98ed-18c15ded22f6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesFairValueToAmortizedCostBasisAbstract_4a434371-e3f4-40ec-b6ea-94a14a7bf9f2" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_bd1b9801-ca8e-4b7c-98ed-18c15ded22f6" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/InvestmentsNarrativeDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#InvestmentsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/InvestmentsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_e67cbf02-230f-459f-97d5-470eecbb0e27" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_db44eb32-8214-48ee-8982-966ecd9cff8c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesAvailableForSaleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_e67cbf02-230f-459f-97d5-470eecbb0e27" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_db44eb32-8214-48ee-8982-966ecd9cff8c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_4e597b84-4fea-4490-9c0b-8916246461b8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_db44eb32-8214-48ee-8982-966ecd9cff8c" xlink:to="loc_us-gaap_FinancialInstrumentAxis_4e597b84-4fea-4490-9c0b-8916246461b8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_4e597b84-4fea-4490-9c0b-8916246461b8_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_4e597b84-4fea-4490-9c0b-8916246461b8" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_4e597b84-4fea-4490-9c0b-8916246461b8_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_86c4be7c-addd-4d53-b8fa-caa1cc52fe90" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_4e597b84-4fea-4490-9c0b-8916246461b8" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_86c4be7c-addd-4d53-b8fa-caa1cc52fe90" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesMember_7cc3ffa4-1db6-425c-b706-2d8e5c7c20bd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_86c4be7c-addd-4d53-b8fa-caa1cc52fe90" xlink:to="loc_us-gaap_DebtSecuritiesMember_7cc3ffa4-1db6-425c-b706-2d8e5c7c20bd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis_7041e099-2c31-43dd-a7ed-2c5aeda92785" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_db44eb32-8214-48ee-8982-966ecd9cff8c" xlink:to="loc_srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis_7041e099-2c31-43dd-a7ed-2c5aeda92785" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MortgageLoansOnRealEstateNamePropertyTypeDomain_7041e099-2c31-43dd-a7ed-2c5aeda92785_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MortgageLoansOnRealEstateNamePropertyTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis_7041e099-2c31-43dd-a7ed-2c5aeda92785" xlink:to="loc_srt_MortgageLoansOnRealEstateNamePropertyTypeDomain_7041e099-2c31-43dd-a7ed-2c5aeda92785_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MortgageLoansOnRealEstateNamePropertyTypeDomain_71996d2d-1eb2-4fab-b5ce-999bee9d7fae" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MortgageLoansOnRealEstateNamePropertyTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis_7041e099-2c31-43dd-a7ed-2c5aeda92785" xlink:to="loc_srt_MortgageLoansOnRealEstateNamePropertyTypeDomain_71996d2d-1eb2-4fab-b5ce-999bee9d7fae" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_CommercialMortgageLoansMember_87163a7b-bb1c-49f6-b5c5-9e8d4a822c2a" xlink:href="fnf-20231231.xsd#fnf_CommercialMortgageLoansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_MortgageLoansOnRealEstateNamePropertyTypeDomain_71996d2d-1eb2-4fab-b5ce-999bee9d7fae" xlink:to="loc_fnf_CommercialMortgageLoansMember_87163a7b-bb1c-49f6-b5c5-9e8d4a822c2a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_MortgageLoansMember_f20219f0-7f68-4450-acf3-8030788d3150" xlink:href="fnf-20231231.xsd#fnf_MortgageLoansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_MortgageLoansOnRealEstateNamePropertyTypeDomain_71996d2d-1eb2-4fab-b5ce-999bee9d7fae" xlink:to="loc_fnf_MortgageLoansMember_f20219f0-7f68-4450-acf3-8030788d3150" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_9bf924d6-667a-4365-956b-596a23434067" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_db44eb32-8214-48ee-8982-966ecd9cff8c" xlink:to="loc_srt_StatementGeographicalAxis_9bf924d6-667a-4365-956b-596a23434067" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_9bf924d6-667a-4365-956b-596a23434067_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_9bf924d6-667a-4365-956b-596a23434067" xlink:to="loc_srt_SegmentGeographicalDomain_9bf924d6-667a-4365-956b-596a23434067_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_7dcdd59f-2954-4053-91ed-a6dfd1ede6c2" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_9bf924d6-667a-4365-956b-596a23434067" xlink:to="loc_srt_SegmentGeographicalDomain_7dcdd59f-2954-4053-91ed-a6dfd1ede6c2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_US_52e20a2d-15dc-4d17-8282-e875bf7a18e6" xlink:href="https://xbrl.sec.gov/country/2023/country-2023.xsd#country_US"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_7dcdd59f-2954-4053-91ed-a6dfd1ede6c2" xlink:to="loc_country_US_52e20a2d-15dc-4d17-8282-e875bf7a18e6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_7d0995c0-d247-4f86-8bfa-e6c1873b4018" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivablePortfolioSegmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_db44eb32-8214-48ee-8982-966ecd9cff8c" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_7d0995c0-d247-4f86-8bfa-e6c1873b4018" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_7d0995c0-d247-4f86-8bfa-e6c1873b4018_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_7d0995c0-d247-4f86-8bfa-e6c1873b4018" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_7d0995c0-d247-4f86-8bfa-e6c1873b4018_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_2ca29ae3-036c-4b0e-ba4a-7387704f3931" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_7d0995c0-d247-4f86-8bfa-e6c1873b4018" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_2ca29ae3-036c-4b0e-ba4a-7387704f3931" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResidentialPortfolioSegmentMember_d77428ba-850f-4194-b7ba-a9f7c1928886" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ResidentialPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_2ca29ae3-036c-4b0e-ba4a-7387704f3931" xlink:to="loc_us-gaap_ResidentialPortfolioSegmentMember_d77428ba-850f-4194-b7ba-a9f7c1928886" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPortfolioSegmentMember_47d56b11-4281-4a58-8ea5-8c0ae98fd2dc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommercialPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_2ca29ae3-036c-4b0e-ba4a-7387704f3931" xlink:to="loc_us-gaap_CommercialPortfolioSegmentMember_47d56b11-4281-4a58-8ea5-8c0ae98fd2dc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_bce16cf6-ab2c-4286-9149-2d7bfd57f3f2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivablesPeriodPastDueAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_db44eb32-8214-48ee-8982-966ecd9cff8c" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_bce16cf6-ab2c-4286-9149-2d7bfd57f3f2" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_bce16cf6-ab2c-4286-9149-2d7bfd57f3f2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivablesPeriodPastDueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_bce16cf6-ab2c-4286-9149-2d7bfd57f3f2" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_bce16cf6-ab2c-4286-9149-2d7bfd57f3f2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_615599e3-b335-4041-a5e7-eecb72ebca62" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivablesPeriodPastDueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_bce16cf6-ab2c-4286-9149-2d7bfd57f3f2" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_615599e3-b335-4041-a5e7-eecb72ebca62" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember_7b325567-fa02-4709-acab-052270d0bdd4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_615599e3-b335-4041-a5e7-eecb72ebca62" xlink:to="loc_us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember_7b325567-fa02-4709-acab-052270d0bdd4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeAxis_cfe29ed8-9c69-41c1-80cf-363cade1db91" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_db44eb32-8214-48ee-8982-966ecd9cff8c" xlink:to="loc_us-gaap_InvestmentTypeAxis_cfe29ed8-9c69-41c1-80cf-363cade1db91" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_cfe29ed8-9c69-41c1-80cf-363cade1db91_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InvestmentTypeAxis_cfe29ed8-9c69-41c1-80cf-363cade1db91" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_cfe29ed8-9c69-41c1-80cf-363cade1db91_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_68b14b36-c01b-4c82-915f-7017773caa83" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InvestmentTypeAxis_cfe29ed8-9c69-41c1-80cf-363cade1db91" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_68b14b36-c01b-4c82-915f-7017773caa83" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FundsWithheldForReinsuranceMember_185e6a76-4812-4aa5-873d-42e583275a34" xlink:href="fnf-20231231.xsd#fnf_FundsWithheldForReinsuranceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_68b14b36-c01b-4c82-915f-7017773caa83" xlink:to="loc_fnf_FundsWithheldForReinsuranceMember_185e6a76-4812-4aa5-873d-42e583275a34" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsHeldByInsuranceRegulators_082ad3c7-3dca-4d7c-a5a0-587130daf82c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AssetsHeldByInsuranceRegulators"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_e67cbf02-230f-459f-97d5-470eecbb0e27" xlink:to="loc_us-gaap_AssetsHeldByInsuranceRegulators_082ad3c7-3dca-4d7c-a5a0-587130daf82c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_InvestmentNonIncomeProducingGreaterThanTwelveMonthsFairValueDisclosure_32f4a199-f045-4ac2-a374-a7b30539b31d" xlink:href="fnf-20231231.xsd#fnf_InvestmentNonIncomeProducingGreaterThanTwelveMonthsFairValueDisclosure"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_e67cbf02-230f-459f-97d5-470eecbb0e27" xlink:to="loc_fnf_InvestmentNonIncomeProducingGreaterThanTwelveMonthsFairValueDisclosure_32f4a199-f045-4ac2-a374-a7b30539b31d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleAccruedInterestAfterAllowanceForCreditLoss_a43bd2a6-5428-4e5b-b7d5-20636e7da928" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesAvailableForSaleAccruedInterestAfterAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_e67cbf02-230f-459f-97d5-470eecbb0e27" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleAccruedInterestAfterAllowanceForCreditLoss_a43bd2a6-5428-4e5b-b7d5-20636e7da928" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1_814eb3b0-a3d5-4798-949f-781de250c39d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_e67cbf02-230f-459f-97d5-470eecbb0e27" xlink:to="loc_us-gaap_FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresCollateralPledged1_814eb3b0-a3d5-4798-949f-781de250c39d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest_30d0a6ca-ed80-4316-91de-6d6b55455267" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_e67cbf02-230f-459f-97d5-470eecbb0e27" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest_30d0a6ca-ed80-4316-91de-6d6b55455267" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAllowanceForCreditLossExcludingAccruedInterest_bad7dc1a-e468-452e-bd62-7c2ea40d95fc" xlink:href="fnf-20231231.xsd#fnf_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAllowanceForCreditLossExcludingAccruedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_e67cbf02-230f-459f-97d5-470eecbb0e27" xlink:to="loc_fnf_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAllowanceForCreditLossExcludingAccruedInterest_bad7dc1a-e468-452e-bd62-7c2ea40d95fc" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_CommercialMortgageLoansPercentageOfInvestments_5f87e6c3-c888-4daf-ac03-2e2d5d5ff8e4" xlink:href="fnf-20231231.xsd#fnf_CommercialMortgageLoansPercentageOfInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_e67cbf02-230f-459f-97d5-470eecbb0e27" xlink:to="loc_fnf_CommercialMortgageLoansPercentageOfInvestments_5f87e6c3-c888-4daf-ac03-2e2d5d5ff8e4" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_DebtServiceCoverageRatioAmortizationPeriod_253b5b95-5e8d-457c-9bae-d1105a941d91" xlink:href="fnf-20231231.xsd#fnf_DebtServiceCoverageRatioAmortizationPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_e67cbf02-230f-459f-97d5-470eecbb0e27" xlink:to="loc_fnf_DebtServiceCoverageRatioAmortizationPeriod_253b5b95-5e8d-457c-9bae-d1105a941d91" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_NumberOfLoansDelinquentInPrincipalOrInterestPayments_6f8a6a3b-c2e4-4fa8-8215-d3646bb8e05a" xlink:href="fnf-20231231.xsd#fnf_NumberOfLoansDelinquentInPrincipalOrInterestPayments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_e67cbf02-230f-459f-97d5-470eecbb0e27" xlink:to="loc_fnf_NumberOfLoansDelinquentInPrincipalOrInterestPayments_6f8a6a3b-c2e4-4fa8-8215-d3646bb8e05a" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_ResidentialMortgageReceivablePercentageofTotal_006db848-24a7-4dba-8af1-96cc82c3740f" xlink:href="fnf-20231231.xsd#fnf_ResidentialMortgageReceivablePercentageofTotal"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_e67cbf02-230f-459f-97d5-470eecbb0e27" xlink:to="loc_fnf_ResidentialMortgageReceivablePercentageofTotal_006db848-24a7-4dba-8af1-96cc82c3740f" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_ResidentialMortgageLoansLocationPercentage_a04cc46e-8d72-48b5-91ac-c2221e1acfa5" xlink:href="fnf-20231231.xsd#fnf_ResidentialMortgageLoansLocationPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_e67cbf02-230f-459f-97d5-470eecbb0e27" xlink:to="loc_fnf_ResidentialMortgageLoansLocationPercentage_a04cc46e-8d72-48b5-91ac-c2221e1acfa5" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoffAfterRecovery_70b38eba-d260-42ad-aada-6f75209d1442" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoffAfterRecovery"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_e67cbf02-230f-459f-97d5-470eecbb0e27" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoffAfterRecovery_70b38eba-d260-42ad-aada-6f75209d1442" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestNonaccrual_689707cc-0b5e-422b-be07-71fdf0c7d5b8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestNonaccrual"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_e67cbf02-230f-459f-97d5-470eecbb0e27" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestNonaccrual_689707cc-0b5e-422b-be07-71fdf0c7d5b8" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MortgageLoansInProcessOfForeclosureAmount_19e77d31-4b61-4672-897c-94be1c9c346c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MortgageLoansInProcessOfForeclosureAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_e67cbf02-230f-459f-97d5-470eecbb0e27" xlink:to="loc_us-gaap_MortgageLoansInProcessOfForeclosureAmount_19e77d31-4b61-4672-897c-94be1c9c346c" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FinancingReceivableAllowanceForCreditLossProbabilityOfLossDefaultModelUsingReasonableAndSupportableProjectedLossForecastPeriod_f89c440a-5bd3-4fae-8b5f-14c932a77c16" xlink:href="fnf-20231231.xsd#fnf_FinancingReceivableAllowanceForCreditLossProbabilityOfLossDefaultModelUsingReasonableAndSupportableProjectedLossForecastPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_e67cbf02-230f-459f-97d5-470eecbb0e27" xlink:to="loc_fnf_FinancingReceivableAllowanceForCreditLossProbabilityOfLossDefaultModelUsingReasonableAndSupportableProjectedLossForecastPeriod_f89c440a-5bd3-4fae-8b5f-14c932a77c16" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FinancingReceivableAllowanceForCreditLossProbabilityOfProjectedLossDefaultProjectionModelUsingMarketHistoricalLossPeriod_4143175b-ef3f-4b61-a748-0b82bc99cf0b" xlink:href="fnf-20231231.xsd#fnf_FinancingReceivableAllowanceForCreditLossProbabilityOfProjectedLossDefaultProjectionModelUsingMarketHistoricalLossPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_e67cbf02-230f-459f-97d5-470eecbb0e27" xlink:to="loc_fnf_FinancingReceivableAllowanceForCreditLossProbabilityOfProjectedLossDefaultProjectionModelUsingMarketHistoricalLossPeriod_4143175b-ef3f-4b61-a748-0b82bc99cf0b" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossInvestmentIncomeOperating_e02e0b8a-ede1-4e7b-94bc-78614f2244b6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GrossInvestmentIncomeOperating"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_e67cbf02-230f-459f-97d5-470eecbb0e27" xlink:to="loc_us-gaap_GrossInvestmentIncomeOperating_e02e0b8a-ede1-4e7b-94bc-78614f2244b6" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_ReinsuranceAgreementRecognizedGainsLosses_fd45bd2e-acda-4465-b2c6-c1871368095c" xlink:href="fnf-20231231.xsd#fnf_ReinsuranceAgreementRecognizedGainsLosses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_e67cbf02-230f-459f-97d5-470eecbb0e27" xlink:to="loc_fnf_ReinsuranceAgreementRecognizedGainsLosses_fd45bd2e-acda-4465-b2c6-c1871368095c" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleAccruedInterestAfterAllowanceForCreditLossStatementOfFinancialPositionExtensibleList_25472355-9144-4785-ac09-855c37620885" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesAvailableForSaleAccruedInterestAfterAllowanceForCreditLossStatementOfFinancialPositionExtensibleList"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_e67cbf02-230f-459f-97d5-470eecbb0e27" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleAccruedInterestAfterAllowanceForCreditLossStatementOfFinancialPositionExtensibleList_25472355-9144-4785-ac09-855c37620885" xlink:type="arc" order="18"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/InvestmentsAmortizedCostandFairValueofFixedMaturityAvailableforSaleSecuritiesDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#InvestmentsAmortizedCostandFairValueofFixedMaturityAvailableforSaleSecuritiesDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/InvestmentsAmortizedCostandFairValueofFixedMaturityAvailableforSaleSecuritiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_ebd98269-1fda-4a4f-9585-5a1d0924bf73" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_1cdb87ea-3609-469c-9e74-d3f6c089b317" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesAvailableForSaleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_ebd98269-1fda-4a4f-9585-5a1d0924bf73" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_1cdb87ea-3609-469c-9e74-d3f6c089b317" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_b86c7bf8-5f68-4bdb-a6f4-f89d47a5cb48" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleTable_1cdb87ea-3609-469c-9e74-d3f6c089b317" xlink:to="loc_us-gaap_FinancialInstrumentAxis_b86c7bf8-5f68-4bdb-a6f4-f89d47a5cb48" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_b86c7bf8-5f68-4bdb-a6f4-f89d47a5cb48_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_b86c7bf8-5f68-4bdb-a6f4-f89d47a5cb48" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_b86c7bf8-5f68-4bdb-a6f4-f89d47a5cb48_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_f911bdcc-9caa-44eb-b205-7a219a0485e5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_b86c7bf8-5f68-4bdb-a6f4-f89d47a5cb48" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_f911bdcc-9caa-44eb-b205-7a219a0485e5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_0e99ba01-3a50-4a02-90d1-7de54e31268a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AssetBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_f911bdcc-9caa-44eb-b205-7a219a0485e5" xlink:to="loc_us-gaap_AssetBackedSecuritiesMember_0e99ba01-3a50-4a02-90d1-7de54e31268a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialMortgageBackedSecuritiesMember_c2c95d21-6efa-4728-bdf5-310bc260ec0c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommercialMortgageBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_f911bdcc-9caa-44eb-b205-7a219a0485e5" xlink:to="loc_us-gaap_CommercialMortgageBackedSecuritiesMember_c2c95d21-6efa-4728-bdf5-310bc260ec0c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_StructuredHybridsMember_0d3055da-16cd-4d5e-9b20-9a8a0756aa8c" xlink:href="fnf-20231231.xsd#fnf_StructuredHybridsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_f911bdcc-9caa-44eb-b205-7a219a0485e5" xlink:to="loc_fnf_StructuredHybridsMember_0d3055da-16cd-4d5e-9b20-9a8a0756aa8c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember_831d5bb7-cc46-4143-a71f-6768774efdc5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_f911bdcc-9caa-44eb-b205-7a219a0485e5" xlink:to="loc_us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember_831d5bb7-cc46-4143-a71f-6768774efdc5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost_640b2891-4f2c-46eb-9d33-d4acb62904d1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_ebd98269-1fda-4a4f-9585-5a1d0924bf73" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost_640b2891-4f2c-46eb-9d33-d4acb62904d1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost_a0ceb1cb-ada9-478b-80bb-93ccb22792e6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_ebd98269-1fda-4a4f-9585-5a1d0924bf73" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost_a0ceb1cb-ada9-478b-80bb-93ccb22792e6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost_6969bd6e-68ac-4d31-b261-64d3a79ffca4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_ebd98269-1fda-4a4f-9585-5a1d0924bf73" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost_6969bd6e-68ac-4d31-b261-64d3a79ffca4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost_74f9909e-c2da-49d9-8c80-613c754920ce" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_ebd98269-1fda-4a4f-9585-5a1d0924bf73" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost_74f9909e-c2da-49d9-8c80-613c754920ce" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis_77645b6f-7d0c-4a86-9729-293c4bd44928" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_ebd98269-1fda-4a4f-9585-5a1d0924bf73" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis_77645b6f-7d0c-4a86-9729-293c4bd44928" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost_0643dcf0-f210-40e1-840c-dcdde210b011" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_ebd98269-1fda-4a4f-9585-5a1d0924bf73" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost_0643dcf0-f210-40e1-840c-dcdde210b011" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue_ee42ba96-0339-40ef-8638-e0f2a5a7310b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_ebd98269-1fda-4a4f-9585-5a1d0924bf73" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue_ee42ba96-0339-40ef-8638-e0f2a5a7310b" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue_4f37c763-f841-4adc-bb90-eccc568ad932" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_ebd98269-1fda-4a4f-9585-5a1d0924bf73" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue_4f37c763-f841-4adc-bb90-eccc568ad932" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue_43477a32-8ad9-4a76-9f83-d73a6553156b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_ebd98269-1fda-4a4f-9585-5a1d0924bf73" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue_43477a32-8ad9-4a76-9f83-d73a6553156b" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue_e31dd5ab-8c28-4c8e-9687-595399738d1a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_ebd98269-1fda-4a4f-9585-5a1d0924bf73" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue_e31dd5ab-8c28-4c8e-9687-595399738d1a" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate_3fc8850d-f340-4179-8e28-a6f02890e547" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_ebd98269-1fda-4a4f-9585-5a1d0924bf73" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate_3fc8850d-f340-4179-8e28-a6f02890e547" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue_9ac70e2e-843e-4d3a-b745-28b14cbe9077" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_ebd98269-1fda-4a4f-9585-5a1d0924bf73" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue_9ac70e2e-843e-4d3a-b745-28b14cbe9077" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss_ea0ee7c5-c808-44f5-9bfe-dcea7092104d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_ebd98269-1fda-4a4f-9585-5a1d0924bf73" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss_ea0ee7c5-c808-44f5-9bfe-dcea7092104d" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_afa22abc-6ce0-4555-9604-eeea6e44023f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems_ebd98269-1fda-4a4f-9585-5a1d0924bf73" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_afa22abc-6ce0-4555-9604-eeea6e44023f" xlink:type="arc" order="13"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/InvestmentsFairValueandGrossUnrealizedLossesofAvailableforSaleSecuritiesDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#InvestmentsFairValueandGrossUnrealizedLossesofAvailableforSaleSecuritiesDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/InvestmentsFairValueandGrossUnrealizedLossesofAvailableforSaleSecuritiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_b6270e1e-7aa2-4e72-a6ba-4eda6898078c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionFairValueTable_601c37f4-a809-4c83-a65e-c6c8fdc8faeb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionFairValueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_b6270e1e-7aa2-4e72-a6ba-4eda6898078c" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionFairValueTable_601c37f4-a809-4c83-a65e-c6c8fdc8faeb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentAxis_9c93343c-a097-42a8-b9ad-3b6b91eee67a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancialInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionFairValueTable_601c37f4-a809-4c83-a65e-c6c8fdc8faeb" xlink:to="loc_us-gaap_FinancialInstrumentAxis_9c93343c-a097-42a8-b9ad-3b6b91eee67a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_9c93343c-a097-42a8-b9ad-3b6b91eee67a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentAxis_9c93343c-a097-42a8-b9ad-3b6b91eee67a" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_9c93343c-a097-42a8-b9ad-3b6b91eee67a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_dfb72967-73ba-405c-8748-b64b5d3f228c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentAxis_9c93343c-a097-42a8-b9ad-3b6b91eee67a" xlink:to="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_dfb72967-73ba-405c-8748-b64b5d3f228c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetBackedSecuritiesMember_1b86cc2e-c718-4662-a62f-42850b893ffd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AssetBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_dfb72967-73ba-405c-8748-b64b5d3f228c" xlink:to="loc_us-gaap_AssetBackedSecuritiesMember_1b86cc2e-c718-4662-a62f-42850b893ffd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialMortgageBackedSecuritiesMember_ab807579-9fb7-4fb5-8296-55c16a59e529" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommercialMortgageBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_dfb72967-73ba-405c-8748-b64b5d3f228c" xlink:to="loc_us-gaap_CommercialMortgageBackedSecuritiesMember_ab807579-9fb7-4fb5-8296-55c16a59e529" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateDebtSecuritiesMember_da690e76-c78e-4fc9-bf3d-ce32fb181129" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CorporateDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_dfb72967-73ba-405c-8748-b64b5d3f228c" xlink:to="loc_us-gaap_CorporateDebtSecuritiesMember_da690e76-c78e-4fc9-bf3d-ce32fb181129" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_HybridsMember_f44cd77e-e494-426c-b292-37a7cc5644b3" xlink:href="fnf-20231231.xsd#fnf_HybridsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_dfb72967-73ba-405c-8748-b64b5d3f228c" xlink:to="loc_fnf_HybridsMember_f44cd77e-e494-426c-b292-37a7cc5644b3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USStatesAndPoliticalSubdivisionsMember_669d9ec5-0b55-4284-93f0-e5b65545a035" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_USStatesAndPoliticalSubdivisionsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_dfb72967-73ba-405c-8748-b64b5d3f228c" xlink:to="loc_us-gaap_USStatesAndPoliticalSubdivisionsMember_669d9ec5-0b55-4284-93f0-e5b65545a035" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember_de72f2d0-b596-41d0-894b-3354b232dda9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_dfb72967-73ba-405c-8748-b64b5d3f228c" xlink:to="loc_us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember_de72f2d0-b596-41d0-894b-3354b232dda9" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_7a0b6ad5-6e50-4486-a4f6-01b5d146da12" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_USGovernmentAgenciesDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_dfb72967-73ba-405c-8748-b64b5d3f228c" xlink:to="loc_us-gaap_USGovernmentAgenciesDebtSecuritiesMember_7a0b6ad5-6e50-4486-a4f6-01b5d146da12" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignGovernmentDebtSecuritiesMember_b6f74256-31c8-43c3-bb2b-6165f682c8cf" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ForeignGovernmentDebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_dfb72967-73ba-405c-8748-b64b5d3f228c" xlink:to="loc_us-gaap_ForeignGovernmentDebtSecuritiesMember_b6f74256-31c8-43c3-bb2b-6165f682c8cf" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months_89fca46c-dffe-4bba-adaf-c7653c0700bd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_b6270e1e-7aa2-4e72-a6ba-4eda6898078c" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months_89fca46c-dffe-4bba-adaf-c7653c0700bd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_9aa72186-7f5d-4b72-87ee-f99d48a638f3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_b6270e1e-7aa2-4e72-a6ba-4eda6898078c" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss_9aa72186-7f5d-4b72-87ee-f99d48a638f3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger_feddfec1-a17e-4c8c-9c8c-9aba9b9a3fa0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_b6270e1e-7aa2-4e72-a6ba-4eda6898078c" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger_feddfec1-a17e-4c8c-9c8c-9aba9b9a3fa0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_adeedc02-94b3-4e17-b5ed-96b3da26fa05" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_b6270e1e-7aa2-4e72-a6ba-4eda6898078c" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss_adeedc02-94b3-4e17-b5ed-96b3da26fa05" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_df38c9cc-d77d-4333-8a38-56de8c596809" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_b6270e1e-7aa2-4e72-a6ba-4eda6898078c" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition_df38c9cc-d77d-4333-8a38-56de8c596809" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_2e9e590e-197c-45c3-815a-016be916d704" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_b6270e1e-7aa2-4e72-a6ba-4eda6898078c" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss_2e9e590e-197c-45c3-815a-016be916d704" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions_80f0d877-a79b-4442-b043-0a60c1715c3f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_b6270e1e-7aa2-4e72-a6ba-4eda6898078c" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions_80f0d877-a79b-4442-b043-0a60c1715c3f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions_a92c2fad-2d83-4902-b2da-8aabf80b9950" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_b6270e1e-7aa2-4e72-a6ba-4eda6898078c" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions_a92c2fad-2d83-4902-b2da-8aabf80b9950" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions_3983f8f1-82ac-463a-a077-e012f41f96bc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract_b6270e1e-7aa2-4e72-a6ba-4eda6898078c" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions_3983f8f1-82ac-463a-a077-e012f41f96bc" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/InvestmentsScheduleofCommercialMortgageLoanGrossofValuationAllowanceByPropertyTypeandRegionDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#InvestmentsScheduleofCommercialMortgageLoanGrossofValuationAllowanceByPropertyTypeandRegionDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/InvestmentsScheduleofCommercialMortgageLoanGrossofValuationAllowanceByPropertyTypeandRegionDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfInvestmentsLineItems_72e98e2c-61a0-48c4-8211-239bab0a7f81" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfInvestmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfInvestmentsTable_2d7e84cb-78fc-4a28-a5ad-ef421f558283" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfInvestmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_72e98e2c-61a0-48c4-8211-239bab0a7f81" xlink:to="loc_us-gaap_ScheduleOfInvestmentsTable_2d7e84cb-78fc-4a28-a5ad-ef421f558283" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis_b366dc43-2a89-4f43-8fab-e254efcceb86" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfInvestmentsTable_2d7e84cb-78fc-4a28-a5ad-ef421f558283" xlink:to="loc_srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis_b366dc43-2a89-4f43-8fab-e254efcceb86" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MortgageLoansOnRealEstateNamePropertyTypeDomain_b366dc43-2a89-4f43-8fab-e254efcceb86_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MortgageLoansOnRealEstateNamePropertyTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis_b366dc43-2a89-4f43-8fab-e254efcceb86" xlink:to="loc_srt_MortgageLoansOnRealEstateNamePropertyTypeDomain_b366dc43-2a89-4f43-8fab-e254efcceb86_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MortgageLoansOnRealEstateNamePropertyTypeDomain_cae7bfff-7338-495d-acf2-972389a5e844" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MortgageLoansOnRealEstateNamePropertyTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis_b366dc43-2a89-4f43-8fab-e254efcceb86" xlink:to="loc_srt_MortgageLoansOnRealEstateNamePropertyTypeDomain_cae7bfff-7338-495d-acf2-972389a5e844" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_HotelMember_14d0585d-f3ec-46d8-b70d-602dfc4d33de" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_HotelMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_MortgageLoansOnRealEstateNamePropertyTypeDomain_cae7bfff-7338-495d-acf2-972389a5e844" xlink:to="loc_srt_HotelMember_14d0585d-f3ec-46d8-b70d-602dfc4d33de" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_IndustrialGeneralMember_6c224600-7eed-44f0-aa99-3101cb7b7523" xlink:href="fnf-20231231.xsd#fnf_IndustrialGeneralMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_MortgageLoansOnRealEstateNamePropertyTypeDomain_cae7bfff-7338-495d-acf2-972389a5e844" xlink:to="loc_fnf_IndustrialGeneralMember_6c224600-7eed-44f0-aa99-3101cb7b7523" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_MixedUsePropertyMember_9e551306-a94c-4970-bb54-5231babfc5b0" xlink:href="fnf-20231231.xsd#fnf_MixedUsePropertyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_MortgageLoansOnRealEstateNamePropertyTypeDomain_cae7bfff-7338-495d-acf2-972389a5e844" xlink:to="loc_fnf_MixedUsePropertyMember_9e551306-a94c-4970-bb54-5231babfc5b0" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MultifamilyMember_137e8033-55a1-49b2-9e8d-f398c7a36b28" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MultifamilyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_MortgageLoansOnRealEstateNamePropertyTypeDomain_cae7bfff-7338-495d-acf2-972389a5e844" xlink:to="loc_srt_MultifamilyMember_137e8033-55a1-49b2-9e8d-f398c7a36b28" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OfficeBuildingMember_e4504868-a934-4c3e-952c-0f2b082fc5f3" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_OfficeBuildingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_MortgageLoansOnRealEstateNamePropertyTypeDomain_cae7bfff-7338-495d-acf2-972389a5e844" xlink:to="loc_srt_OfficeBuildingMember_e4504868-a934-4c3e-952c-0f2b082fc5f3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RetailSiteMember_544f839c-8899-4a4a-9f84-b43af1be9a4b" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RetailSiteMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_MortgageLoansOnRealEstateNamePropertyTypeDomain_cae7bfff-7338-495d-acf2-972389a5e844" xlink:to="loc_srt_RetailSiteMember_544f839c-8899-4a4a-9f84-b43af1be9a4b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_StudentHousingMember_a6ad2e5e-23ee-4bf0-bed9-39f88720e44c" xlink:href="fnf-20231231.xsd#fnf_StudentHousingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_MortgageLoansOnRealEstateNamePropertyTypeDomain_cae7bfff-7338-495d-acf2-972389a5e844" xlink:to="loc_fnf_StudentHousingMember_a6ad2e5e-23ee-4bf0-bed9-39f88720e44c" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OtherPropertyMember_7dc82c8c-6093-4900-846c-34f006c0b089" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_OtherPropertyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_MortgageLoansOnRealEstateNamePropertyTypeDomain_cae7bfff-7338-495d-acf2-972389a5e844" xlink:to="loc_srt_OtherPropertyMember_7dc82c8c-6093-4900-846c-34f006c0b089" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_60709812-58d3-4495-bfa7-9b0c0058b20a" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfInvestmentsTable_2d7e84cb-78fc-4a28-a5ad-ef421f558283" xlink:to="loc_srt_StatementGeographicalAxis_60709812-58d3-4495-bfa7-9b0c0058b20a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_60709812-58d3-4495-bfa7-9b0c0058b20a_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_60709812-58d3-4495-bfa7-9b0c0058b20a" xlink:to="loc_srt_SegmentGeographicalDomain_60709812-58d3-4495-bfa7-9b0c0058b20a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_21c728fa-1a5f-4fc1-aa3e-514a0df56ed3" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_60709812-58d3-4495-bfa7-9b0c0058b20a" xlink:to="loc_srt_SegmentGeographicalDomain_21c728fa-1a5f-4fc1-aa3e-514a0df56ed3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_EastNorthCentralUSMember_4b701ce5-05ae-401a-8c5a-4d8b8017fcbd" xlink:href="fnf-20231231.xsd#fnf_EastNorthCentralUSMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_21c728fa-1a5f-4fc1-aa3e-514a0df56ed3" xlink:to="loc_fnf_EastNorthCentralUSMember_4b701ce5-05ae-401a-8c5a-4d8b8017fcbd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_EastSouthCentralMember_0f172851-6d62-4352-906d-ba4102198b71" xlink:href="fnf-20231231.xsd#fnf_EastSouthCentralMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_21c728fa-1a5f-4fc1-aa3e-514a0df56ed3" xlink:to="loc_fnf_EastSouthCentralMember_0f172851-6d62-4352-906d-ba4102198b71" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_MiddleAtlanticUSMember_8fb32fcb-438e-45f2-a8c2-b1379bf17044" xlink:href="fnf-20231231.xsd#fnf_MiddleAtlanticUSMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_21c728fa-1a5f-4fc1-aa3e-514a0df56ed3" xlink:to="loc_fnf_MiddleAtlanticUSMember_8fb32fcb-438e-45f2-a8c2-b1379bf17044" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_MountainMember_c41cfa4a-8d98-4301-9198-cbe66812d6e5" xlink:href="fnf-20231231.xsd#fnf_MountainMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_21c728fa-1a5f-4fc1-aa3e-514a0df56ed3" xlink:to="loc_fnf_MountainMember_c41cfa4a-8d98-4301-9198-cbe66812d6e5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_NewEnglandMember_ef8b3400-60fb-403e-bd50-384cd60917fd" xlink:href="fnf-20231231.xsd#fnf_NewEnglandMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_21c728fa-1a5f-4fc1-aa3e-514a0df56ed3" xlink:to="loc_fnf_NewEnglandMember_ef8b3400-60fb-403e-bd50-384cd60917fd" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_PacificUSMember_f793f120-d86d-4ad1-989d-f291cf5794f7" xlink:href="fnf-20231231.xsd#fnf_PacificUSMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_21c728fa-1a5f-4fc1-aa3e-514a0df56ed3" xlink:to="loc_fnf_PacificUSMember_f793f120-d86d-4ad1-989d-f291cf5794f7" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_SouthAtlanticUSMember_2d3218e9-f3d0-4c24-9eab-bfa62e6d8d38" xlink:href="fnf-20231231.xsd#fnf_SouthAtlanticUSMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_21c728fa-1a5f-4fc1-aa3e-514a0df56ed3" xlink:to="loc_fnf_SouthAtlanticUSMember_2d3218e9-f3d0-4c24-9eab-bfa62e6d8d38" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_WestNorthCentralUSMember_40a04978-e1b3-48f0-9b5a-1a76a82a5cb9" xlink:href="fnf-20231231.xsd#fnf_WestNorthCentralUSMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_21c728fa-1a5f-4fc1-aa3e-514a0df56ed3" xlink:to="loc_fnf_WestNorthCentralUSMember_40a04978-e1b3-48f0-9b5a-1a76a82a5cb9" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_WestSouthCentralUSMember_6cf59ab3-f459-4a0c-88a7-bae4221054b8" xlink:href="fnf-20231231.xsd#fnf_WestSouthCentralUSMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_21c728fa-1a5f-4fc1-aa3e-514a0df56ed3" xlink:to="loc_fnf_WestSouthCentralUSMember_6cf59ab3-f459-4a0c-88a7-bae4221054b8" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_77802f88-925f-4a5b-8883-f9a975f826a7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivablePortfolioSegmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfInvestmentsTable_2d7e84cb-78fc-4a28-a5ad-ef421f558283" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_77802f88-925f-4a5b-8883-f9a975f826a7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_77802f88-925f-4a5b-8883-f9a975f826a7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_77802f88-925f-4a5b-8883-f9a975f826a7" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_77802f88-925f-4a5b-8883-f9a975f826a7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_85fc106c-e857-4cee-8cf1-5d735ab1114a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_77802f88-925f-4a5b-8883-f9a975f826a7" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_85fc106c-e857-4cee-8cf1-5d735ab1114a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPortfolioSegmentMember_72f6a7c5-357f-4be1-98d7-c151db66960b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommercialPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_85fc106c-e857-4cee-8cf1-5d735ab1114a" xlink:to="loc_us-gaap_CommercialPortfolioSegmentMember_72f6a7c5-357f-4be1-98d7-c151db66960b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_93502b01-673f-4dfe-a1fa-551a4eabee08" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_72e98e2c-61a0-48c4-8211-239bab0a7f81" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_93502b01-673f-4dfe-a1fa-551a4eabee08" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest_3d1374f5-a8b7-48c5-9512-0d684eb6008c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_72e98e2c-61a0-48c4-8211-239bab0a7f81" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest_3d1374f5-a8b7-48c5-9512-0d684eb6008c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss_34d9416f-eba9-4944-8474-013fac286c03" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_72e98e2c-61a0-48c4-8211-239bab0a7f81" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss_34d9416f-eba9-4944-8474-013fac286c03" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_FinancingReceivableBeforeAllowanceForCreditLossToTotalPercent_de18ea49-aede-4aa9-b035-db1a826e5d3a" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_FinancingReceivableBeforeAllowanceForCreditLossToTotalPercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_72e98e2c-61a0-48c4-8211-239bab0a7f81" xlink:to="loc_srt_FinancingReceivableBeforeAllowanceForCreditLossToTotalPercent_de18ea49-aede-4aa9-b035-db1a826e5d3a" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/InvestmentsCommercialMortgageLoansSegregatedbyAgingofLoansandChargeOffsbyYearofOriginationDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#InvestmentsCommercialMortgageLoansSegregatedbyAgingofLoansandChargeOffsbyYearofOriginationDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/InvestmentsCommercialMortgageLoansSegregatedbyAgingofLoansandChargeOffsbyYearofOriginationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_a1b8890e-b9c2-4dcd-9075-cde9fe6dba05" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableRecordedInvestmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_a79b109a-3f33-430c-b0c3-ee71d5153a4d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_a1b8890e-b9c2-4dcd-9075-cde9fe6dba05" xlink:to="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_a79b109a-3f33-430c-b0c3-ee71d5153a4d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_c8490b1a-5496-4a1d-b339-568c82305e99" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivablePortfolioSegmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_a79b109a-3f33-430c-b0c3-ee71d5153a4d" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_c8490b1a-5496-4a1d-b339-568c82305e99" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_c8490b1a-5496-4a1d-b339-568c82305e99_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_c8490b1a-5496-4a1d-b339-568c82305e99" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_c8490b1a-5496-4a1d-b339-568c82305e99_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_7bd6db9f-d773-4638-a1c0-17ccdd57c7ce" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_c8490b1a-5496-4a1d-b339-568c82305e99" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_7bd6db9f-d773-4638-a1c0-17ccdd57c7ce" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPortfolioSegmentMember_db183769-46a7-4a31-a249-0d34c376f84c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommercialPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_7bd6db9f-d773-4638-a1c0-17ccdd57c7ce" xlink:to="loc_us-gaap_CommercialPortfolioSegmentMember_db183769-46a7-4a31-a249-0d34c376f84c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_5c858dfe-81a5-46fc-b7c3-8c11f9f5e341" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivablesPeriodPastDueAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_a79b109a-3f33-430c-b0c3-ee71d5153a4d" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_5c858dfe-81a5-46fc-b7c3-8c11f9f5e341" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_5c858dfe-81a5-46fc-b7c3-8c11f9f5e341_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivablesPeriodPastDueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_5c858dfe-81a5-46fc-b7c3-8c11f9f5e341" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_5c858dfe-81a5-46fc-b7c3-8c11f9f5e341_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_9f712dd1-ea61-47f2-b02d-47b2f18f3324" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivablesPeriodPastDueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_5c858dfe-81a5-46fc-b7c3-8c11f9f5e341" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_9f712dd1-ea61-47f2-b02d-47b2f18f3324" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivables1To29DaysPastDueMember_04209e41-230e-4990-9b3b-472cf2033191" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivables1To29DaysPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_9f712dd1-ea61-47f2-b02d-47b2f18f3324" xlink:to="loc_us-gaap_FinancingReceivables1To29DaysPastDueMember_04209e41-230e-4990-9b3b-472cf2033191" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FinancialAsset30To89DaysPastDueMember_6678a3dc-b737-458f-8bf1-0af58a1de54f" xlink:href="fnf-20231231.xsd#fnf_FinancialAsset30To89DaysPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_9f712dd1-ea61-47f2-b02d-47b2f18f3324" xlink:to="loc_fnf_FinancialAsset30To89DaysPastDueMember_6678a3dc-b737-458f-8bf1-0af58a1de54f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember_4ddd15d7-f89e-4fbb-9a66-6fc9382f48b6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_9f712dd1-ea61-47f2-b02d-47b2f18f3324" xlink:to="loc_us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember_4ddd15d7-f89e-4fbb-9a66-6fc9382f48b6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_CreditQualityIndicatorCurrentYearAbstract_8e4e3675-92d2-4168-b91f-ead6561e61b0" xlink:href="fnf-20231231.xsd#fnf_CreditQualityIndicatorCurrentYearAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_a1b8890e-b9c2-4dcd-9075-cde9fe6dba05" xlink:to="loc_fnf_CreditQualityIndicatorCurrentYearAbstract_8e4e3675-92d2-4168-b91f-ead6561e61b0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear_e4ba11cb-d86d-46e0-b411-963f30ca15c4" xlink:href="fnf-20231231.xsd#fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_CreditQualityIndicatorCurrentYearAbstract_8e4e3675-92d2-4168-b91f-ead6561e61b0" xlink:to="loc_fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear_e4ba11cb-d86d-46e0-b411-963f30ca15c4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear_4ac61435-9161-4834-9d4d-c7b1d8af15f1" xlink:href="fnf-20231231.xsd#fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_CreditQualityIndicatorCurrentYearAbstract_8e4e3675-92d2-4168-b91f-ead6561e61b0" xlink:to="loc_fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear_4ac61435-9161-4834-9d4d-c7b1d8af15f1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear_a95c4908-e6f4-4ee9-9c42-b5442a406d61" xlink:href="fnf-20231231.xsd#fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_CreditQualityIndicatorCurrentYearAbstract_8e4e3675-92d2-4168-b91f-ead6561e61b0" xlink:to="loc_fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear_a95c4908-e6f4-4ee9-9c42-b5442a406d61" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear_10217121-3744-4861-8b29-bb9ab2ed6fd2" xlink:href="fnf-20231231.xsd#fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_CreditQualityIndicatorCurrentYearAbstract_8e4e3675-92d2-4168-b91f-ead6561e61b0" xlink:to="loc_fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear_10217121-3744-4861-8b29-bb9ab2ed6fd2" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear_c2d848a1-46d0-405a-850e-9a94d5238053" xlink:href="fnf-20231231.xsd#fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_CreditQualityIndicatorCurrentYearAbstract_8e4e3675-92d2-4168-b91f-ead6561e61b0" xlink:to="loc_fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear_c2d848a1-46d0-405a-850e-9a94d5238053" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear_e5c3feec-68a7-4e96-82a4-dd2ca248eb11" xlink:href="fnf-20231231.xsd#fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_CreditQualityIndicatorCurrentYearAbstract_8e4e3675-92d2-4168-b91f-ead6561e61b0" xlink:to="loc_fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear_e5c3feec-68a7-4e96-82a4-dd2ca248eb11" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossFeeAndLoanInProcess_00a72273-3d19-454c-9b2a-ea53bbb6f634" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossFeeAndLoanInProcess"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_CreditQualityIndicatorCurrentYearAbstract_8e4e3675-92d2-4168-b91f-ead6561e61b0" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossFeeAndLoanInProcess_00a72273-3d19-454c-9b2a-ea53bbb6f634" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoffByOriginationYearAbstract_543ec7a9-343b-4182-9e91-32ab7ee310c7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoffByOriginationYearAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_a1b8890e-b9c2-4dcd-9075-cde9fe6dba05" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoffByOriginationYearAbstract_543ec7a9-343b-4182-9e91-32ab7ee310c7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYearWriteoff_691fed0d-ac56-440a-89d0-e9c881d4a3ce" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYearWriteoff"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoffByOriginationYearAbstract_543ec7a9-343b-4182-9e91-32ab7ee310c7" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYearWriteoff_691fed0d-ac56-440a-89d0-e9c881d4a3ce" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearWriteoff_236ff54f-bf71-4b7b-9081-c1873d9211f8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearWriteoff"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoffByOriginationYearAbstract_543ec7a9-343b-4182-9e91-32ab7ee310c7" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearWriteoff_236ff54f-bf71-4b7b-9081-c1873d9211f8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYearWriteoff_9b0c778b-daf4-4d6f-a8ec-f5af51604966" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYearWriteoff"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoffByOriginationYearAbstract_543ec7a9-343b-4182-9e91-32ab7ee310c7" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYearWriteoff_9b0c778b-daf4-4d6f-a8ec-f5af51604966" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYearWriteoff_a4565d46-b946-4beb-b259-64eec92da39c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYearWriteoff"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoffByOriginationYearAbstract_543ec7a9-343b-4182-9e91-32ab7ee310c7" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYearWriteoff_a4565d46-b946-4beb-b259-64eec92da39c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYearWriteoff_88d7bb4f-0268-4e5f-bdeb-5d864776f112" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYearWriteoff"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoffByOriginationYearAbstract_543ec7a9-343b-4182-9e91-32ab7ee310c7" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYearWriteoff_88d7bb4f-0268-4e5f-bdeb-5d864776f112" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYearWriteoff_7f46f58d-e210-4bb0-b1da-178e2bcfd00c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYearWriteoff"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoffByOriginationYearAbstract_543ec7a9-343b-4182-9e91-32ab7ee310c7" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYearWriteoff_7f46f58d-e210-4bb0-b1da-178e2bcfd00c" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff_20493342-0b59-4b55-9273-6554480d88fc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoffByOriginationYearAbstract_543ec7a9-343b-4182-9e91-32ab7ee310c7" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff_20493342-0b59-4b55-9273-6554480d88fc" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_CreditQualityIndicatorPriorYearAbstract_ed8c1052-eb8f-4011-b36e-98c77c21497e" xlink:href="fnf-20231231.xsd#fnf_CreditQualityIndicatorPriorYearAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_a1b8890e-b9c2-4dcd-9075-cde9fe6dba05" xlink:to="loc_fnf_CreditQualityIndicatorPriorYearAbstract_ed8c1052-eb8f-4011-b36e-98c77c21497e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear_5cd6a6d6-da5c-457c-8ea7-b5fd1d7dc986" xlink:href="fnf-20231231.xsd#fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear_3f0fd589-bea2-4938-b8fa-3b01341965eb" xlink:href="fnf-20231231.xsd#fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear_8e509aec-6ec5-43c8-be68-3539f8133e91" xlink:href="fnf-20231231.xsd#fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear_6a8abbc8-4da3-4aaa-bc02-a7a9c2a58327" xlink:href="fnf-20231231.xsd#fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear_1755e027-db6d-426e-9d8e-251abd04b98e" xlink:href="fnf-20231231.xsd#fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear_0152af60-02b1-42d2-a3c6-ecdad776735e" xlink:href="fnf-20231231.xsd#fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossFeeAndLoanInProcess_e347db9b-a408-480e-86b4-644692303682" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossFeeAndLoanInProcess"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_LoansUnderDevelopmentAmortizedCost_b2b92ec9-f9c7-445e-8189-1dbf8b61703c" xlink:href="fnf-20231231.xsd#fnf_LoansUnderDevelopmentAmortizedCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_CreditQualityIndicatorPriorYearAbstract_ed8c1052-eb8f-4011-b36e-98c77c21497e" xlink:to="loc_fnf_LoansUnderDevelopmentAmortizedCost_b2b92ec9-f9c7-445e-8189-1dbf8b61703c" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_LoansUnderDevelopmentFairValue_bbb36c38-1c57-4f8d-9c75-5fc05a72e40b" xlink:href="fnf-20231231.xsd#fnf_LoansUnderDevelopmentFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_CreditQualityIndicatorPriorYearAbstract_ed8c1052-eb8f-4011-b36e-98c77c21497e" xlink:to="loc_fnf_LoansUnderDevelopmentFairValue_bbb36c38-1c57-4f8d-9c75-5fc05a72e40b" xlink:type="arc" order="9"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/InvestmentsScheduleofInvestmentinCMLsbyLoantoValueandDebtServiceCoverageRatiosDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#InvestmentsScheduleofInvestmentinCMLsbyLoantoValueandDebtServiceCoverageRatiosDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/InvestmentsScheduleofInvestmentinCMLsbyLoantoValueandDebtServiceCoverageRatiosDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfInvestmentsLineItems_30d67d91-e1a8-4ef8-9bad-daaa71919bd2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfInvestmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfInvestmentsTable_7dc3f432-b8d3-4b20-aa92-f9ea48705571" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfInvestmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_30d67d91-e1a8-4ef8-9bad-daaa71919bd2" xlink:to="loc_us-gaap_ScheduleOfInvestmentsTable_7dc3f432-b8d3-4b20-aa92-f9ea48705571" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_DebtServiceCoverageRatioAxis_dd2b2259-69f2-4418-bcf2-ad44816a41b3" xlink:href="fnf-20231231.xsd#fnf_DebtServiceCoverageRatioAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfInvestmentsTable_7dc3f432-b8d3-4b20-aa92-f9ea48705571" xlink:to="loc_fnf_DebtServiceCoverageRatioAxis_dd2b2259-69f2-4418-bcf2-ad44816a41b3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_DebtServiceCoverageRatioDomain_dd2b2259-69f2-4418-bcf2-ad44816a41b3_default" xlink:href="fnf-20231231.xsd#fnf_DebtServiceCoverageRatioDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_fnf_DebtServiceCoverageRatioAxis_dd2b2259-69f2-4418-bcf2-ad44816a41b3" xlink:to="loc_fnf_DebtServiceCoverageRatioDomain_dd2b2259-69f2-4418-bcf2-ad44816a41b3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_DebtServiceCoverageRatioDomain_0e785c02-9d6a-4d16-9203-b7baea85a6e5" xlink:href="fnf-20231231.xsd#fnf_DebtServiceCoverageRatioDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_fnf_DebtServiceCoverageRatioAxis_dd2b2259-69f2-4418-bcf2-ad44816a41b3" xlink:to="loc_fnf_DebtServiceCoverageRatioDomain_0e785c02-9d6a-4d16-9203-b7baea85a6e5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_GreaterThanOnePointTwoFiveMember_a52e2bcd-0f96-418d-9110-64660434a315" xlink:href="fnf-20231231.xsd#fnf_GreaterThanOnePointTwoFiveMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_DebtServiceCoverageRatioDomain_0e785c02-9d6a-4d16-9203-b7baea85a6e5" xlink:to="loc_fnf_GreaterThanOnePointTwoFiveMember_a52e2bcd-0f96-418d-9110-64660434a315" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_GreaterThanOneButLessThanOnePointTwoFiveMember_ec81c0bd-6bab-488c-a8fd-e01ec6fd96ec" xlink:href="fnf-20231231.xsd#fnf_GreaterThanOneButLessThanOnePointTwoFiveMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_DebtServiceCoverageRatioDomain_0e785c02-9d6a-4d16-9203-b7baea85a6e5" xlink:to="loc_fnf_GreaterThanOneButLessThanOnePointTwoFiveMember_ec81c0bd-6bab-488c-a8fd-e01ec6fd96ec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_GreaterThanOnePointZeroZeroMember_e8b950e2-0bdd-4c6c-8a3e-797454b74dd3" xlink:href="fnf-20231231.xsd#fnf_GreaterThanOnePointZeroZeroMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_DebtServiceCoverageRatioDomain_0e785c02-9d6a-4d16-9203-b7baea85a6e5" xlink:to="loc_fnf_GreaterThanOnePointZeroZeroMember_e8b950e2-0bdd-4c6c-8a3e-797454b74dd3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_LessThanOnePointZeroZeroMember_224e9614-296d-4710-ae4b-019d97a98f7e" xlink:href="fnf-20231231.xsd#fnf_LessThanOnePointZeroZeroMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_DebtServiceCoverageRatioDomain_0e785c02-9d6a-4d16-9203-b7baea85a6e5" xlink:to="loc_fnf_LessThanOnePointZeroZeroMember_224e9614-296d-4710-ae4b-019d97a98f7e" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_7480075d-cda7-4dec-9fff-631a6f0aca2f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivablePortfolioSegmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfInvestmentsTable_7dc3f432-b8d3-4b20-aa92-f9ea48705571" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_7480075d-cda7-4dec-9fff-631a6f0aca2f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_7480075d-cda7-4dec-9fff-631a6f0aca2f_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_7480075d-cda7-4dec-9fff-631a6f0aca2f" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_7480075d-cda7-4dec-9fff-631a6f0aca2f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_800edcc1-116e-43c9-bd53-a21a53adbe84" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_7480075d-cda7-4dec-9fff-631a6f0aca2f" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_800edcc1-116e-43c9-bd53-a21a53adbe84" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPortfolioSegmentMember_36ba101a-6a74-4146-8220-6959bbca7169" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommercialPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_800edcc1-116e-43c9-bd53-a21a53adbe84" xlink:to="loc_us-gaap_CommercialPortfolioSegmentMember_36ba101a-6a74-4146-8220-6959bbca7169" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoanToValueAxis_d4922c48-7df1-4eff-b951-1259142930a2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LoanToValueAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfInvestmentsTable_7dc3f432-b8d3-4b20-aa92-f9ea48705571" xlink:to="loc_us-gaap_LoanToValueAxis_d4922c48-7df1-4eff-b951-1259142930a2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoanToValueDomain_d4922c48-7df1-4eff-b951-1259142930a2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LoanToValueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LoanToValueAxis_d4922c48-7df1-4eff-b951-1259142930a2" xlink:to="loc_us-gaap_LoanToValueDomain_d4922c48-7df1-4eff-b951-1259142930a2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LoanToValueDomain_ce6d9d36-712e-49b3-b1e2-6721a7194db4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LoanToValueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LoanToValueAxis_d4922c48-7df1-4eff-b951-1259142930a2" xlink:to="loc_us-gaap_LoanToValueDomain_ce6d9d36-712e-49b3-b1e2-6721a7194db4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_LTVLessThan50PercentMember_b9701a59-8391-4434-a33f-007c164ef9c1" xlink:href="fnf-20231231.xsd#fnf_LTVLessThan50PercentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LoanToValueDomain_ce6d9d36-712e-49b3-b1e2-6721a7194db4" xlink:to="loc_fnf_LTVLessThan50PercentMember_b9701a59-8391-4434-a33f-007c164ef9c1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_LTV50To5999PercentMember_a7bec565-d6f5-4b06-ad72-8575a280857d" xlink:href="fnf-20231231.xsd#fnf_LTV50To5999PercentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LoanToValueDomain_ce6d9d36-712e-49b3-b1e2-6721a7194db4" xlink:to="loc_fnf_LTV50To5999PercentMember_a7bec565-d6f5-4b06-ad72-8575a280857d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_LTV60To7499PercentMember_237e9c5e-3b8d-4f36-8242-34892a61d7a8" xlink:href="fnf-20231231.xsd#fnf_LTV60To7499PercentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LoanToValueDomain_ce6d9d36-712e-49b3-b1e2-6721a7194db4" xlink:to="loc_fnf_LTV60To7499PercentMember_237e9c5e-3b8d-4f36-8242-34892a61d7a8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_LTV75To8499PercentMember_4ac6ccc6-958f-4e29-8688-bd868aeaf0f8" xlink:href="fnf-20231231.xsd#fnf_LTV75To8499PercentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LoanToValueDomain_ce6d9d36-712e-49b3-b1e2-6721a7194db4" xlink:to="loc_fnf_LTV75To8499PercentMember_4ac6ccc6-958f-4e29-8688-bd868aeaf0f8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByMeasurementBasisAxis_49f34f31-f9f8-4470-a388-d3a261091b3d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueByMeasurementBasisAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfInvestmentsTable_7dc3f432-b8d3-4b20-aa92-f9ea48705571" xlink:to="loc_us-gaap_FairValueByMeasurementBasisAxis_49f34f31-f9f8-4470-a388-d3a261091b3d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_49f34f31-f9f8-4470-a388-d3a261091b3d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_49f34f31-f9f8-4470-a388-d3a261091b3d" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_49f34f31-f9f8-4470-a388-d3a261091b3d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueDisclosureItemAmountsDomain_3d882aba-b464-4bcf-a7d1-98099e519b5a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueDisclosureItemAmountsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByMeasurementBasisAxis_49f34f31-f9f8-4470-a388-d3a261091b3d" xlink:to="loc_us-gaap_FairValueDisclosureItemAmountsDomain_3d882aba-b464-4bcf-a7d1-98099e519b5a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_bc4de7c9-d73b-4695-82de-fc7a60c71231" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PortionAtFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_3d882aba-b464-4bcf-a7d1-98099e519b5a" xlink:to="loc_us-gaap_PortionAtFairValueFairValueDisclosureMember_bc4de7c9-d73b-4695-82de-fc7a60c71231" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_f8fba6ad-a797-4b85-ad7a-3cc6fababc40" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EstimateOfFairValueFairValueDisclosureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueDisclosureItemAmountsDomain_3d882aba-b464-4bcf-a7d1-98099e519b5a" xlink:to="loc_us-gaap_EstimateOfFairValueFairValueDisclosureMember_f8fba6ad-a797-4b85-ad7a-3cc6fababc40" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossFeeAndLoanInProcess_58a2cb47-b773-48e8-81c6-ceac0d9938ba" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossFeeAndLoanInProcess"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_30d67d91-e1a8-4ef8-9bad-daaa71919bd2" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossFeeAndLoanInProcess_58a2cb47-b773-48e8-81c6-ceac0d9938ba" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_FinancingReceivableBeforeAllowanceForCreditLossToTotalPercent_6143efb1-1d6f-4250-ba32-77df5ef34949" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_FinancingReceivableBeforeAllowanceForCreditLossToTotalPercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_30d67d91-e1a8-4ef8-9bad-daaa71919bd2" xlink:to="loc_srt_FinancingReceivableBeforeAllowanceForCreditLossToTotalPercent_6143efb1-1d6f-4250-ba32-77df5ef34949" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossByOriginationYearAbstract_fbd0c03a-5a3e-4bba-9ecd-c3198c2f3fe7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossByOriginationYearAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_30d67d91-e1a8-4ef8-9bad-daaa71919bd2" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossByOriginationYearAbstract_fbd0c03a-5a3e-4bba-9ecd-c3198c2f3fe7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_CreditQualityIndicatorCurrentYearAbstract_f4956208-7d85-4cc1-80dc-671d39e4cd54" xlink:href="fnf-20231231.xsd#fnf_CreditQualityIndicatorCurrentYearAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossByOriginationYearAbstract_fbd0c03a-5a3e-4bba-9ecd-c3198c2f3fe7" xlink:to="loc_fnf_CreditQualityIndicatorCurrentYearAbstract_f4956208-7d85-4cc1-80dc-671d39e4cd54" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear_25c6657b-5eb2-434a-88fa-5c592dd8bb51" xlink:href="fnf-20231231.xsd#fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_CreditQualityIndicatorCurrentYearAbstract_f4956208-7d85-4cc1-80dc-671d39e4cd54" xlink:to="loc_fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear_25c6657b-5eb2-434a-88fa-5c592dd8bb51" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear_b9ac076e-3d04-47fe-8623-348060f9b4ac" xlink:href="fnf-20231231.xsd#fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_CreditQualityIndicatorCurrentYearAbstract_f4956208-7d85-4cc1-80dc-671d39e4cd54" xlink:to="loc_fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear_b9ac076e-3d04-47fe-8623-348060f9b4ac" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear_08a872e1-b13c-4a9e-8646-d1590e0ea43f" xlink:href="fnf-20231231.xsd#fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_CreditQualityIndicatorCurrentYearAbstract_f4956208-7d85-4cc1-80dc-671d39e4cd54" xlink:to="loc_fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear_08a872e1-b13c-4a9e-8646-d1590e0ea43f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear_328d08a9-77b9-4dc7-bc0c-c5f0096d287d" xlink:href="fnf-20231231.xsd#fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_CreditQualityIndicatorCurrentYearAbstract_f4956208-7d85-4cc1-80dc-671d39e4cd54" xlink:to="loc_fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear_328d08a9-77b9-4dc7-bc0c-c5f0096d287d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear_555b0115-32c1-495c-b99a-9028d788fb54" xlink:href="fnf-20231231.xsd#fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_CreditQualityIndicatorCurrentYearAbstract_f4956208-7d85-4cc1-80dc-671d39e4cd54" xlink:to="loc_fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear_555b0115-32c1-495c-b99a-9028d788fb54" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear_d6ee4982-095f-4be6-a19e-ea3b492bc285" xlink:href="fnf-20231231.xsd#fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_CreditQualityIndicatorCurrentYearAbstract_f4956208-7d85-4cc1-80dc-671d39e4cd54" xlink:to="loc_fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear_d6ee4982-095f-4be6-a19e-ea3b492bc285" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossFeeAndLoanInProcess_0c1ca8e8-01da-467f-b5ae-8cd2bd1c732a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossFeeAndLoanInProcess"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_CreditQualityIndicatorPriorYearAbstract_0b7111d8-841a-41c4-9d2a-7436ae528d52" xlink:href="fnf-20231231.xsd#fnf_CreditQualityIndicatorPriorYearAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossByOriginationYearAbstract_fbd0c03a-5a3e-4bba-9ecd-c3198c2f3fe7" xlink:to="loc_fnf_CreditQualityIndicatorPriorYearAbstract_0b7111d8-841a-41c4-9d2a-7436ae528d52" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear_578b9669-6e65-4e38-a9d8-0f105e6ca59e" xlink:href="fnf-20231231.xsd#fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear_20a698bb-a321-469f-a248-960ddebde212" xlink:href="fnf-20231231.xsd#fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear_ac1cd908-f420-4e96-9114-dbf5195ae695" xlink:href="fnf-20231231.xsd#fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear_33a17210-f287-4c3f-9e9d-fd67ec1d9864" xlink:href="fnf-20231231.xsd#fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear_b2319c66-a5da-4bdf-94e0-f8a8914c7c29" xlink:href="fnf-20231231.xsd#fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear_325809cf-f0dc-4226-b531-5a7d2c7ca3bd" xlink:href="fnf-20231231.xsd#fnf_FinancingReceivableExcludingLoansInProcessExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossFeeAndLoanInProcess_110b8a43-e781-4ebc-afb2-fdfdebc76f2c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossFeeAndLoanInProcess"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_LoansUnderDevelopmentAmortizedCost_a63b772e-13f1-4c37-9bef-1c2baa99fd21" xlink:href="fnf-20231231.xsd#fnf_LoansUnderDevelopmentAmortizedCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_CreditQualityIndicatorPriorYearAbstract_0b7111d8-841a-41c4-9d2a-7436ae528d52" xlink:to="loc_fnf_LoansUnderDevelopmentAmortizedCost_a63b772e-13f1-4c37-9bef-1c2baa99fd21" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_LoansUnderDevelopmentFairValue_e49a3ad1-62d4-4cd7-ad38-1e1c5e37f59e" xlink:href="fnf-20231231.xsd#fnf_LoansUnderDevelopmentFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_CreditQualityIndicatorPriorYearAbstract_0b7111d8-841a-41c4-9d2a-7436ae528d52" xlink:to="loc_fnf_LoansUnderDevelopmentFairValue_e49a3ad1-62d4-4cd7-ad38-1e1c5e37f59e" xlink:type="arc" order="9"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/InvestmentsScheduleofResidentialMortgageLoanbyStateDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#InvestmentsScheduleofResidentialMortgageLoanbyStateDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/InvestmentsScheduleofResidentialMortgageLoanbyStateDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementLineItems_8177dcf2-4d41-4b46-ad2d-ec2d812d9a71" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTable_d7cf2cf9-584a-48d5-8390-5dc700854b66" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ConcentrationRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatementLineItems_8177dcf2-4d41-4b46-ad2d-ec2d812d9a71" xlink:to="loc_us-gaap_ConcentrationRiskTable_d7cf2cf9-584a-48d5-8390-5dc700854b66" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_ba93418c-a1d1-4a83-ac19-21bfaa8766c0" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_d7cf2cf9-584a-48d5-8390-5dc700854b66" xlink:to="loc_srt_StatementGeographicalAxis_ba93418c-a1d1-4a83-ac19-21bfaa8766c0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_ba93418c-a1d1-4a83-ac19-21bfaa8766c0_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_ba93418c-a1d1-4a83-ac19-21bfaa8766c0" xlink:to="loc_srt_SegmentGeographicalDomain_ba93418c-a1d1-4a83-ac19-21bfaa8766c0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_9c3c8859-e344-43f8-a368-93afc4802441" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_ba93418c-a1d1-4a83-ac19-21bfaa8766c0" xlink:to="loc_srt_SegmentGeographicalDomain_9c3c8859-e344-43f8-a368-93afc4802441" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_stpr_FL_745e0cb9-29bc-49f9-99c5-93a19db03485" xlink:href="https://xbrl.sec.gov/stpr/2023/stpr-2023.xsd#stpr_FL"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_9c3c8859-e344-43f8-a368-93afc4802441" xlink:to="loc_stpr_FL_745e0cb9-29bc-49f9-99c5-93a19db03485" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_stpr_TX_1bd500a6-e6c3-4155-8611-a8adcd55f9d1" xlink:href="https://xbrl.sec.gov/stpr/2023/stpr-2023.xsd#stpr_TX"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_9c3c8859-e344-43f8-a368-93afc4802441" xlink:to="loc_stpr_TX_1bd500a6-e6c3-4155-8611-a8adcd55f9d1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_stpr_NJ_04962831-cda2-4962-b696-d73bfc987305" xlink:href="https://xbrl.sec.gov/stpr/2023/stpr-2023.xsd#stpr_NJ"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_9c3c8859-e344-43f8-a368-93afc4802441" xlink:to="loc_stpr_NJ_04962831-cda2-4962-b696-d73bfc987305" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_stpr_PA_ac54d668-2518-45d2-a278-382448006943" xlink:href="https://xbrl.sec.gov/stpr/2023/stpr-2023.xsd#stpr_PA"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_9c3c8859-e344-43f8-a368-93afc4802441" xlink:to="loc_stpr_PA_ac54d668-2518-45d2-a278-382448006943" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_stpr_CA_b266ca27-36e7-48c7-995c-271d3cd570f1" xlink:href="https://xbrl.sec.gov/stpr/2023/stpr-2023.xsd#stpr_CA"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_9c3c8859-e344-43f8-a368-93afc4802441" xlink:to="loc_stpr_CA_b266ca27-36e7-48c7-995c-271d3cd570f1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_stpr_NY_5d05c446-9689-4ad9-a8bc-0a266fb0c3c7" xlink:href="https://xbrl.sec.gov/stpr/2023/stpr-2023.xsd#stpr_NY"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_9c3c8859-e344-43f8-a368-93afc4802441" xlink:to="loc_stpr_NY_5d05c446-9689-4ad9-a8bc-0a266fb0c3c7" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_stpr_GA_bba188e4-9333-40dc-81b6-4ca1e7f6d035" xlink:href="https://xbrl.sec.gov/stpr/2023/stpr-2023.xsd#stpr_GA"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_9c3c8859-e344-43f8-a368-93afc4802441" xlink:to="loc_stpr_GA_bba188e4-9333-40dc-81b6-4ca1e7f6d035" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_AllOtherStatesMember_e053e126-3a8a-4c46-8c19-d2c89dfa72a6" xlink:href="fnf-20231231.xsd#fnf_AllOtherStatesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_9c3c8859-e344-43f8-a368-93afc4802441" xlink:to="loc_fnf_AllOtherStatesMember_e053e126-3a8a-4c46-8c19-d2c89dfa72a6" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_b393bf0c-9796-487f-b316-ecc310fc0624" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivablePortfolioSegmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_d7cf2cf9-584a-48d5-8390-5dc700854b66" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_b393bf0c-9796-487f-b316-ecc310fc0624" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_b393bf0c-9796-487f-b316-ecc310fc0624_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_b393bf0c-9796-487f-b316-ecc310fc0624" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_b393bf0c-9796-487f-b316-ecc310fc0624_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_97ec89ca-e084-42bb-bbe6-9dd793cdf8b0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_b393bf0c-9796-487f-b316-ecc310fc0624" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_97ec89ca-e084-42bb-bbe6-9dd793cdf8b0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResidentialPortfolioSegmentMember_19c7d85a-a91b-41d0-8c77-f8cba534dff5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ResidentialPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_97ec89ca-e084-42bb-bbe6-9dd793cdf8b0" xlink:to="loc_us-gaap_ResidentialPortfolioSegmentMember_19c7d85a-a91b-41d0-8c77-f8cba534dff5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_200b646e-2582-481d-be0a-58cece451429" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_8177dcf2-4d41-4b46-ad2d-ec2d812d9a71" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_200b646e-2582-481d-be0a-58cece451429" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest_65c6d8eb-b5f4-4b23-a224-844944c0dc89" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_8177dcf2-4d41-4b46-ad2d-ec2d812d9a71" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest_65c6d8eb-b5f4-4b23-a224-844944c0dc89" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_FinancingReceivableBeforeAllowanceForCreditLossToTotalPercent_7c91a370-95c3-48c4-b5e0-ab51e3bc822d" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_FinancingReceivableBeforeAllowanceForCreditLossToTotalPercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_8177dcf2-4d41-4b46-ad2d-ec2d812d9a71" xlink:to="loc_srt_FinancingReceivableBeforeAllowanceForCreditLossToTotalPercent_7c91a370-95c3-48c4-b5e0-ab51e3bc822d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss_713d7076-b4a4-430d-9758-e2febc7e82dd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatementLineItems_8177dcf2-4d41-4b46-ad2d-ec2d812d9a71" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss_713d7076-b4a4-430d-9758-e2febc7e82dd" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/InvestmentsCreditQualityofRMLsDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#InvestmentsCreditQualityofRMLsDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/InvestmentsCreditQualityofRMLsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_ee4036e4-0a7f-4ea0-91f7-3d2fc28b182f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableRecordedInvestmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_247de0df-5eac-4d40-b6aa-560ee4028b13" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_ee4036e4-0a7f-4ea0-91f7-3d2fc28b182f" xlink:to="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_247de0df-5eac-4d40-b6aa-560ee4028b13" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_920bc41b-4cea-43ea-ae9c-8ebd6ef00138" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivablePortfolioSegmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_247de0df-5eac-4d40-b6aa-560ee4028b13" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_920bc41b-4cea-43ea-ae9c-8ebd6ef00138" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_920bc41b-4cea-43ea-ae9c-8ebd6ef00138_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_920bc41b-4cea-43ea-ae9c-8ebd6ef00138" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_920bc41b-4cea-43ea-ae9c-8ebd6ef00138_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_9c4bb2a0-6b7f-4dc5-aac8-9d7037cf3e6e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_920bc41b-4cea-43ea-ae9c-8ebd6ef00138" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_9c4bb2a0-6b7f-4dc5-aac8-9d7037cf3e6e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResidentialPortfolioSegmentMember_33ea7f0e-c8a3-484a-a366-0dd21436079e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ResidentialPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_9c4bb2a0-6b7f-4dc5-aac8-9d7037cf3e6e" xlink:to="loc_us-gaap_ResidentialPortfolioSegmentMember_33ea7f0e-c8a3-484a-a366-0dd21436079e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentPerformanceStatusAxis_354ac33e-631a-46e3-80b5-9a16ae7d5370" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancialInstrumentPerformanceStatusAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_247de0df-5eac-4d40-b6aa-560ee4028b13" xlink:to="loc_us-gaap_FinancialInstrumentPerformanceStatusAxis_354ac33e-631a-46e3-80b5-9a16ae7d5370" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentPerformanceStatusDomain_354ac33e-631a-46e3-80b5-9a16ae7d5370_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancialInstrumentPerformanceStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancialInstrumentPerformanceStatusAxis_354ac33e-631a-46e3-80b5-9a16ae7d5370" xlink:to="loc_us-gaap_FinancialInstrumentPerformanceStatusDomain_354ac33e-631a-46e3-80b5-9a16ae7d5370_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialInstrumentPerformanceStatusDomain_1b762e23-4848-42e9-a604-f2f795d44965" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancialInstrumentPerformanceStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancialInstrumentPerformanceStatusAxis_354ac33e-631a-46e3-80b5-9a16ae7d5370" xlink:to="loc_us-gaap_FinancialInstrumentPerformanceStatusDomain_1b762e23-4848-42e9-a604-f2f795d44965" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PerformingFinancingReceivableMember_62a77828-7467-4111-84cd-189c43da984b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PerformingFinancingReceivableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentPerformanceStatusDomain_1b762e23-4848-42e9-a604-f2f795d44965" xlink:to="loc_us-gaap_PerformingFinancingReceivableMember_62a77828-7467-4111-84cd-189c43da984b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonperformingFinancingReceivableMember_05335c32-eb65-4a66-aca6-6a5216f9a18e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NonperformingFinancingReceivableMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancialInstrumentPerformanceStatusDomain_1b762e23-4848-42e9-a604-f2f795d44965" xlink:to="loc_us-gaap_NonperformingFinancingReceivableMember_05335c32-eb65-4a66-aca6-6a5216f9a18e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_cbde2249-f9e5-44e3-9d94-c6c48197bd2c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_ee4036e4-0a7f-4ea0-91f7-3d2fc28b182f" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_cbde2249-f9e5-44e3-9d94-c6c48197bd2c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest_b7a772e5-847f-49c6-a65e-92209a83caca" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_ee4036e4-0a7f-4ea0-91f7-3d2fc28b182f" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest_b7a772e5-847f-49c6-a65e-92209a83caca" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss_66315fa7-8bfa-43ef-b61f-b436ef92970a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_ee4036e4-0a7f-4ea0-91f7-3d2fc28b182f" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestAfterAllowanceForCreditLoss_66315fa7-8bfa-43ef-b61f-b436ef92970a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_FinancingReceivableBeforeAllowanceForCreditLossToTotalPercent_d218f845-42cc-428e-9f04-c787191805da" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_FinancingReceivableBeforeAllowanceForCreditLossToTotalPercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_ee4036e4-0a7f-4ea0-91f7-3d2fc28b182f" xlink:to="loc_srt_FinancingReceivableBeforeAllowanceForCreditLossToTotalPercent_d218f845-42cc-428e-9f04-c787191805da" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FinancingReceivableAllowanceForExpectedCreditLossPercent_758f570e-1885-4d7c-8b1b-2583bdbf1b3b" xlink:href="fnf-20231231.xsd#fnf_FinancingReceivableAllowanceForExpectedCreditLossPercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_ee4036e4-0a7f-4ea0-91f7-3d2fc28b182f" xlink:to="loc_fnf_FinancingReceivableAllowanceForExpectedCreditLossPercent_758f570e-1885-4d7c-8b1b-2583bdbf1b3b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_FinancingReceivableAllowanceForCreditLossToOutstandingPercent_06225917-30d0-4fdc-9567-9d81dcdaf261" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_FinancingReceivableAllowanceForCreditLossToOutstandingPercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_ee4036e4-0a7f-4ea0-91f7-3d2fc28b182f" xlink:to="loc_srt_FinancingReceivableAllowanceForCreditLossToOutstandingPercent_06225917-30d0-4fdc-9567-9d81dcdaf261" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/InvestmentsScheduleofResidentialLoansSegregatedbyRiskRatingExposureandNonaccrualLoansbyAmortizedCostDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#InvestmentsScheduleofResidentialLoansSegregatedbyRiskRatingExposureandNonaccrualLoansbyAmortizedCostDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/InvestmentsScheduleofResidentialLoansSegregatedbyRiskRatingExposureandNonaccrualLoansbyAmortizedCostDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfInvestmentsLineItems_d723ac36-5991-4869-a0e4-02e6c39bb2d1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfInvestmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfInvestmentsTable_a09b93ab-1dc5-4351-8f66-99644d8b17ef" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfInvestmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_d723ac36-5991-4869-a0e4-02e6c39bb2d1" xlink:to="loc_us-gaap_ScheduleOfInvestmentsTable_a09b93ab-1dc5-4351-8f66-99644d8b17ef" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_15db520f-7554-49e0-8ac7-810e57501462" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivablesPeriodPastDueAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfInvestmentsTable_a09b93ab-1dc5-4351-8f66-99644d8b17ef" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_15db520f-7554-49e0-8ac7-810e57501462" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_15db520f-7554-49e0-8ac7-810e57501462_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivablesPeriodPastDueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_15db520f-7554-49e0-8ac7-810e57501462" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_15db520f-7554-49e0-8ac7-810e57501462_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_c09d63f7-8ea2-495b-abae-d5b93e79f99c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivablesPeriodPastDueDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueAxis_15db520f-7554-49e0-8ac7-810e57501462" xlink:to="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_c09d63f7-8ea2-495b-abae-d5b93e79f99c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivables1To29DaysPastDueMember_38bfd912-9798-431d-83e7-37050a009ca1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivables1To29DaysPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_c09d63f7-8ea2-495b-abae-d5b93e79f99c" xlink:to="loc_us-gaap_FinancingReceivables1To29DaysPastDueMember_38bfd912-9798-431d-83e7-37050a009ca1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FinancialAsset30To89DaysPastDueMember_20a5fdea-0071-4de7-83fe-fd1d885f180a" xlink:href="fnf-20231231.xsd#fnf_FinancialAsset30To89DaysPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_c09d63f7-8ea2-495b-abae-d5b93e79f99c" xlink:to="loc_fnf_FinancialAsset30To89DaysPastDueMember_20a5fdea-0071-4de7-83fe-fd1d885f180a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember_4c3e6305-0c1e-4ebe-bbe9-369cee89bbb6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablesPeriodPastDueDomain_c09d63f7-8ea2-495b-abae-d5b93e79f99c" xlink:to="loc_us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember_4c3e6305-0c1e-4ebe-bbe9-369cee89bbb6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_ca526e8b-afa6-4d45-86be-8fc9996839de" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivablePortfolioSegmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfInvestmentsTable_a09b93ab-1dc5-4351-8f66-99644d8b17ef" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_ca526e8b-afa6-4d45-86be-8fc9996839de" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_ca526e8b-afa6-4d45-86be-8fc9996839de_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_ca526e8b-afa6-4d45-86be-8fc9996839de" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_ca526e8b-afa6-4d45-86be-8fc9996839de_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_90f0d548-6358-46b0-93f6-905894ae05ef" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_ca526e8b-afa6-4d45-86be-8fc9996839de" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_90f0d548-6358-46b0-93f6-905894ae05ef" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResidentialPortfolioSegmentMember_d3f4b0e1-8b01-4d18-99e0-6339f407e2f5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ResidentialPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_90f0d548-6358-46b0-93f6-905894ae05ef" xlink:to="loc_us-gaap_ResidentialPortfolioSegmentMember_d3f4b0e1-8b01-4d18-99e0-6339f407e2f5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_CreditQualityIndicatorCurrentYearAbstract_c7c11158-904d-4af0-aae7-d841d754a016" xlink:href="fnf-20231231.xsd#fnf_CreditQualityIndicatorCurrentYearAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_d723ac36-5991-4869-a0e4-02e6c39bb2d1" xlink:to="loc_fnf_CreditQualityIndicatorCurrentYearAbstract_c7c11158-904d-4af0-aae7-d841d754a016" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear_c8563090-6880-4b4a-919d-052c51421a89" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_CreditQualityIndicatorCurrentYearAbstract_c7c11158-904d-4af0-aae7-d841d754a016" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear_c8563090-6880-4b4a-919d-052c51421a89" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear_c355a4b1-e271-4fb4-970f-b89ed721a464" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_CreditQualityIndicatorCurrentYearAbstract_c7c11158-904d-4af0-aae7-d841d754a016" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear_c355a4b1-e271-4fb4-970f-b89ed721a464" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear_6bf6f33b-2bf1-42d5-89f8-f5ed30dd07e3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_CreditQualityIndicatorCurrentYearAbstract_c7c11158-904d-4af0-aae7-d841d754a016" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear_6bf6f33b-2bf1-42d5-89f8-f5ed30dd07e3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear_ecfb104f-67d6-4f31-a818-1bffbd79db17" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_CreditQualityIndicatorCurrentYearAbstract_c7c11158-904d-4af0-aae7-d841d754a016" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear_ecfb104f-67d6-4f31-a818-1bffbd79db17" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear_08c8fee8-f79d-41ab-862a-9c6f96887f90" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_CreditQualityIndicatorCurrentYearAbstract_c7c11158-904d-4af0-aae7-d841d754a016" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear_08c8fee8-f79d-41ab-862a-9c6f96887f90" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear_0f408eb4-7174-48a1-8e8b-593259ad645f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_CreditQualityIndicatorCurrentYearAbstract_c7c11158-904d-4af0-aae7-d841d754a016" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear_0f408eb4-7174-48a1-8e8b-593259ad645f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_8a332ff8-2f65-455d-bffe-634edaf1115d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_CreditQualityIndicatorCurrentYearAbstract_c7c11158-904d-4af0-aae7-d841d754a016" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_8a332ff8-2f65-455d-bffe-634edaf1115d" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_CreditQualityIndicatorPriorYearAbstract_a42c7960-adcc-40c0-8786-9629a95b6aec" xlink:href="fnf-20231231.xsd#fnf_CreditQualityIndicatorPriorYearAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_d723ac36-5991-4869-a0e4-02e6c39bb2d1" xlink:to="loc_fnf_CreditQualityIndicatorPriorYearAbstract_a42c7960-adcc-40c0-8786-9629a95b6aec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear_d8e01007-03da-4045-89b4-a4e8bda1b8b2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYear"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear_3c897ef2-a9af-42c3-92d0-085a4ad0d523" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYear"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear_770a6f48-b80f-47d7-bda0-b30fc5d86608" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYear"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear_dd966869-f00e-48f9-803f-a1751e1bc833" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYear"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear_a7a9519c-fb61-48f4-932c-4620a1b70775" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYear"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear_5ca3dc70-df43-439d-9a11-ee894d856087" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYear"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss_092d0889-11fc-44b0-9c16-2ff84c487ee3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLoss"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/InvestmentsAmortizedCostsofNonaccrualLoansDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#InvestmentsAmortizedCostsofNonaccrualLoansDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/InvestmentsAmortizedCostsofNonaccrualLoansDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_b526f4c9-24e7-4141-9b0c-81c9271cf504" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableRecordedInvestmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_6fd11d6e-fe75-4760-ab05-0b6f39b1c379" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_b526f4c9-24e7-4141-9b0c-81c9271cf504" xlink:to="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_6fd11d6e-fe75-4760-ab05-0b6f39b1c379" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_e3787132-8aac-4e69-ac5b-4941b22e8b2e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivablePortfolioSegmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableRecordedInvestmentCreditQualityIndicatorTable_6fd11d6e-fe75-4760-ab05-0b6f39b1c379" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_e3787132-8aac-4e69-ac5b-4941b22e8b2e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_e3787132-8aac-4e69-ac5b-4941b22e8b2e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_e3787132-8aac-4e69-ac5b-4941b22e8b2e" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_e3787132-8aac-4e69-ac5b-4941b22e8b2e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_bb52bdbc-54aa-46d1-ad5f-c3c4d2ad7f8a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_e3787132-8aac-4e69-ac5b-4941b22e8b2e" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_bb52bdbc-54aa-46d1-ad5f-c3c4d2ad7f8a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResidentialPortfolioSegmentMember_adc9bdea-269f-416d-a514-bb799076b595" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ResidentialPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_bb52bdbc-54aa-46d1-ad5f-c3c4d2ad7f8a" xlink:to="loc_us-gaap_ResidentialPortfolioSegmentMember_adc9bdea-269f-416d-a514-bb799076b595" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPortfolioSegmentMember_908b38f7-a17e-4959-bb32-e01f057a5c53" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommercialPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_bb52bdbc-54aa-46d1-ad5f-c3c4d2ad7f8a" xlink:to="loc_us-gaap_CommercialPortfolioSegmentMember_908b38f7-a17e-4959-bb32-e01f057a5c53" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableExcludingAccruedInterestNonaccrual_d8df1fdf-d580-4851-9f72-d13d8e0fdb49" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableExcludingAccruedInterestNonaccrual"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableRecordedInvestmentLineItems_b526f4c9-24e7-4141-9b0c-81c9271cf504" xlink:to="loc_us-gaap_FinancingReceivableExcludingAccruedInterestNonaccrual_d8df1fdf-d580-4851-9f72-d13d8e0fdb49" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/InvestmentsChangesinAllowanceforExpectedCreditLossesonMortgageLoansDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#InvestmentsChangesinAllowanceforExpectedCreditLossesonMortgageLoansDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/InvestmentsChangesinAllowanceforExpectedCreditLossesonMortgageLoansDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_efe0c153-02fa-4cc3-8520-2cb791a4c7a4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_c9479a49-1206-47b0-97c0-85bd58c88c76" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_efe0c153-02fa-4cc3-8520-2cb791a4c7a4" xlink:to="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_c9479a49-1206-47b0-97c0-85bd58c88c76" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_015893d2-ecd7-4dc1-94e0-e6cfd16995c3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivablePortfolioSegmentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFinancingReceivableAllowanceForCreditLossesTable_c9479a49-1206-47b0-97c0-85bd58c88c76" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_015893d2-ecd7-4dc1-94e0-e6cfd16995c3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_015893d2-ecd7-4dc1-94e0-e6cfd16995c3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_015893d2-ecd7-4dc1-94e0-e6cfd16995c3" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_015893d2-ecd7-4dc1-94e0-e6cfd16995c3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_e623e888-1ef7-450f-a050-1b8b5995c50e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivablePortfolioSegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentAxis_015893d2-ecd7-4dc1-94e0-e6cfd16995c3" xlink:to="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_e623e888-1ef7-450f-a050-1b8b5995c50e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResidentialPortfolioSegmentMember_5b9ee9ce-8a88-44b1-8c5c-7e58410b3a4d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ResidentialPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_e623e888-1ef7-450f-a050-1b8b5995c50e" xlink:to="loc_us-gaap_ResidentialPortfolioSegmentMember_5b9ee9ce-8a88-44b1-8c5c-7e58410b3a4d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommercialPortfolioSegmentMember_5edca5d6-c801-4552-8f73-ec53d668f0a5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommercialPortfolioSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivablePortfolioSegmentDomain_e623e888-1ef7-450f-a050-1b8b5995c50e" xlink:to="loc_us-gaap_CommercialPortfolioSegmentMember_5edca5d6-c801-4552-8f73-ec53d668f0a5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_94441775-c5cd-4d6f-bc16-1cac1d474569" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesLineItems_efe0c153-02fa-4cc3-8520-2cb791a4c7a4" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_94441775-c5cd-4d6f-bc16-1cac1d474569" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest_fdfd8a01-6293-4975-a9f1-1b659a24dc01" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_94441775-c5cd-4d6f-bc16-1cac1d474569" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest_fdfd8a01-6293-4975-a9f1-1b659a24dc01" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProvisionForLoanLossesExpensed_f2fe9491-3f99-4755-9d19-760cc57f0925" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProvisionForLoanLossesExpensed"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesRollForward_94441775-c5cd-4d6f-bc16-1cac1d474569" xlink:to="loc_us-gaap_ProvisionForLoanLossesExpensed_f2fe9491-3f99-4755-9d19-760cc57f0925" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest_54bb153c-b29e-4dac-8681-41832ed0528a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossExcludingAccruedInterest"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/InvestmentsMajorSourcesofInterestandInvestmentIncomeDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#InvestmentsMajorSourcesofInterestandInvestmentIncomeDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/InvestmentsMajorSourcesofInterestandInvestmentIncomeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfInvestmentsLineItems_de818308-79d6-4097-9472-569c5195eb2f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfInvestmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfInvestmentsTable_7bf9797b-f908-4830-acf8-97af54289f09" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfInvestmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_de818308-79d6-4097-9472-569c5195eb2f" xlink:to="loc_us-gaap_ScheduleOfInvestmentsTable_7bf9797b-f908-4830-acf8-97af54289f09" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeAxis_e02f1fc7-d9e9-4143-b3c5-9bc8855faed2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfInvestmentsTable_7bf9797b-f908-4830-acf8-97af54289f09" xlink:to="loc_us-gaap_InvestmentTypeAxis_e02f1fc7-d9e9-4143-b3c5-9bc8855faed2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_e02f1fc7-d9e9-4143-b3c5-9bc8855faed2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InvestmentTypeAxis_e02f1fc7-d9e9-4143-b3c5-9bc8855faed2" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_e02f1fc7-d9e9-4143-b3c5-9bc8855faed2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_e2de1b5e-dfe3-4c94-91aa-99ffaab7a64c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InvestmentTypeAxis_e02f1fc7-d9e9-4143-b3c5-9bc8855faed2" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_e2de1b5e-dfe3-4c94-91aa-99ffaab7a64c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesMember_f40bba9e-0de6-433c-b4de-57c0d22dd6bd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_e2de1b5e-dfe3-4c94-91aa-99ffaab7a64c" xlink:to="loc_us-gaap_DebtSecuritiesMember_f40bba9e-0de6-433c-b4de-57c0d22dd6bd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesMember_a5b175a9-9c7e-47ba-867d-2e36cf20dfb9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquitySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_e2de1b5e-dfe3-4c94-91aa-99ffaab7a64c" xlink:to="loc_us-gaap_EquitySecuritiesMember_a5b175a9-9c7e-47ba-867d-2e36cf20dfb9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockMember_7f2dfe36-d4bf-4797-9c80-c3e5562eb31c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_e2de1b5e-dfe3-4c94-91aa-99ffaab7a64c" xlink:to="loc_us-gaap_PreferredStockMember_7f2dfe36-d4bf-4797-9c80-c3e5562eb31c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_MortgageLoansMember_44f4020c-765b-4749-80ff-eb3cd9c287b5" xlink:href="fnf-20231231.xsd#fnf_MortgageLoansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_e2de1b5e-dfe3-4c94-91aa-99ffaab7a64c" xlink:to="loc_fnf_MortgageLoansMember_44f4020c-765b-4749-80ff-eb3cd9c287b5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_InvestedCashAndShortTermInvestmentsMember_ff8c864e-ab7a-4808-aa2b-ae65488807c5" xlink:href="fnf-20231231.xsd#fnf_InvestedCashAndShortTermInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_e2de1b5e-dfe3-4c94-91aa-99ffaab7a64c" xlink:to="loc_fnf_InvestedCashAndShortTermInvestmentsMember_ff8c864e-ab7a-4808-aa2b-ae65488807c5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_LimitedPartnershipMember_76ee475b-3f4e-4467-b9da-d960c52f2097" xlink:href="fnf-20231231.xsd#fnf_LimitedPartnershipMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_e2de1b5e-dfe3-4c94-91aa-99ffaab7a64c" xlink:to="loc_fnf_LimitedPartnershipMember_76ee475b-3f4e-4467-b9da-d960c52f2097" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_TaxDeferredPropertyExchangeMember_026b1eaf-a904-42c2-ad3e-afcd306dcca6" xlink:href="fnf-20231231.xsd#fnf_TaxDeferredPropertyExchangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_e2de1b5e-dfe3-4c94-91aa-99ffaab7a64c" xlink:to="loc_fnf_TaxDeferredPropertyExchangeMember_026b1eaf-a904-42c2-ad3e-afcd306dcca6" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherInvestmentsMember_e2f5c8c9-22ef-4bd3-9cc0-e1bf352b6402" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_e2de1b5e-dfe3-4c94-91aa-99ffaab7a64c" xlink:to="loc_us-gaap_OtherInvestmentsMember_e2f5c8c9-22ef-4bd3-9cc0-e1bf352b6402" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossInvestmentIncomeOperating_0e1af4ca-593a-45b9-b1e3-5f16da8926a0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GrossInvestmentIncomeOperating"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_de818308-79d6-4097-9472-569c5195eb2f" xlink:to="loc_us-gaap_GrossInvestmentIncomeOperating_0e1af4ca-593a-45b9-b1e3-5f16da8926a0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeInvestmentExpense_386906cf-d1c2-4873-b4d4-36d24d651e8b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentIncomeInvestmentExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_de818308-79d6-4097-9472-569c5195eb2f" xlink:to="loc_us-gaap_InvestmentIncomeInvestmentExpense_386906cf-d1c2-4873-b4d4-36d24d651e8b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetInvestmentIncome_8d0fa558-cb70-4a5e-a8b2-49d5e8025b48" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetInvestmentIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_de818308-79d6-4097-9472-569c5195eb2f" xlink:to="loc_us-gaap_NetInvestmentIncome_8d0fa558-cb70-4a5e-a8b2-49d5e8025b48" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/InvestmentsInvestmentGainsLossesNetDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#InvestmentsInvestmentGainsLossesNetDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/InvestmentsInvestmentGainsLossesNetDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfInvestmentsLineItems_b45fd01b-c228-4375-8d8a-17a8377f588b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfInvestmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfInvestmentsTable_5d9041e0-73ca-4e86-99a9-e377b5755555" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfInvestmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_b45fd01b-c228-4375-8d8a-17a8377f588b" xlink:to="loc_us-gaap_ScheduleOfInvestmentsTable_5d9041e0-73ca-4e86-99a9-e377b5755555" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeAxis_06322ca1-ce2f-4533-9834-752630cacb73" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfInvestmentsTable_5d9041e0-73ca-4e86-99a9-e377b5755555" xlink:to="loc_us-gaap_InvestmentTypeAxis_06322ca1-ce2f-4533-9834-752630cacb73" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_06322ca1-ce2f-4533-9834-752630cacb73_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InvestmentTypeAxis_06322ca1-ce2f-4533-9834-752630cacb73" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_06322ca1-ce2f-4533-9834-752630cacb73_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_a7e89d94-b958-4341-86d0-d7cf0730575c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InvestmentTypeAxis_06322ca1-ce2f-4533-9834-752630cacb73" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_a7e89d94-b958-4341-86d0-d7cf0730575c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesMember_270b7e75-1d4e-4919-ba67-66f03a642c0c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquitySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_a7e89d94-b958-4341-86d0-d7cf0730575c" xlink:to="loc_us-gaap_EquitySecuritiesMember_270b7e75-1d4e-4919-ba67-66f03a642c0c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockMember_9053b8c1-0440-473a-8e10-9207f0df7430" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_a7e89d94-b958-4341-86d0-d7cf0730575c" xlink:to="loc_us-gaap_PreferredStockMember_9053b8c1-0440-473a-8e10-9207f0df7430" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesRealizedGainLoss_4031e0de-00d4-45ca-ac10-7a02cf348f8c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtSecuritiesRealizedGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_b45fd01b-c228-4375-8d8a-17a8377f588b" xlink:to="loc_us-gaap_DebtSecuritiesRealizedGainLoss_4031e0de-00d4-45ca-ac10-7a02cf348f8c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNiRealizedGainLoss_8bb19aea-52c4-4ac4-9324-bc59d552483a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquitySecuritiesFvNiRealizedGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_b45fd01b-c228-4375-8d8a-17a8377f588b" xlink:to="loc_us-gaap_EquitySecuritiesFvNiRealizedGainLoss_8bb19aea-52c4-4ac4-9324-bc59d552483a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSaleOfOtherInvestments_79c6b39d-2517-4941-9cb5-d163ce1fb21e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GainLossOnSaleOfOtherInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_b45fd01b-c228-4375-8d8a-17a8377f588b" xlink:to="loc_us-gaap_GainLossOnSaleOfOtherInvestments_79c6b39d-2517-4941-9cb5-d163ce1fb21e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease_1f26a24f-f65a-4c3f-86f0-9e0b47f1939d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_b45fd01b-c228-4375-8d8a-17a8377f588b" xlink:to="loc_us-gaap_FinancingReceivableAllowanceForCreditLossesPeriodIncreaseDecrease_1f26a24f-f65a-4c3f-86f0-9e0b47f1939d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSaleOfDerivatives_b4cd1fc2-fdf0-4db6-9d79-7cb22107db2e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GainLossOnSaleOfDerivatives"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_b45fd01b-c228-4375-8d8a-17a8377f588b" xlink:to="loc_us-gaap_GainLossOnSaleOfDerivatives_b4cd1fc2-fdf0-4db6-9d79-7cb22107db2e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrealizedGainLossOnDerivatives_cfbd3895-367e-4cb2-b7d0-08a2a1c0d7c0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnrealizedGainLossOnDerivatives"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_b45fd01b-c228-4375-8d8a-17a8377f588b" xlink:to="loc_us-gaap_UnrealizedGainLossOnDerivatives_cfbd3895-367e-4cb2-b7d0-08a2a1c0d7c0" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeGainLossOnDerivativeNet_b3b145d6-061a-477e-b451-1d41ff93a4ff" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeGainLossOnDerivativeNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_b45fd01b-c228-4375-8d8a-17a8377f588b" xlink:to="loc_us-gaap_DerivativeGainLossOnDerivativeNet_b3b145d6-061a-477e-b451-1d41ff93a4ff" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmbeddedDerivativeGainLossOnEmbeddedDerivativeNet_f3278476-90f8-4bd7-896b-a2c435271df2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EmbeddedDerivativeGainLossOnEmbeddedDerivativeNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_b45fd01b-c228-4375-8d8a-17a8377f588b" xlink:to="loc_us-gaap_EmbeddedDerivativeGainLossOnEmbeddedDerivativeNet_f3278476-90f8-4bd7-896b-a2c435271df2" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_ChangeInFairValueDerivativesIncludingOtherDerivatives_71a88a5b-d2c1-4364-b3a2-92dbaa13ddd9" xlink:href="fnf-20231231.xsd#fnf_ChangeInFairValueDerivativesIncludingOtherDerivatives"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_b45fd01b-c228-4375-8d8a-17a8377f588b" xlink:to="loc_fnf_ChangeInFairValueDerivativesIncludingOtherDerivatives_71a88a5b-d2c1-4364-b3a2-92dbaa13ddd9" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnInvestments_41ff3a6e-1cf7-488c-8f65-4d2fac7c0dab" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GainLossOnInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_b45fd01b-c228-4375-8d8a-17a8377f588b" xlink:to="loc_us-gaap_GainLossOnInvestments_41ff3a6e-1cf7-488c-8f65-4d2fac7c0dab" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_EquitySecuritiesFVNIValuationGainLoss_07e80d3c-ddf3-49b3-aae5-ece3c21061a8" xlink:href="fnf-20231231.xsd#fnf_EquitySecuritiesFVNIValuationGainLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_b45fd01b-c228-4375-8d8a-17a8377f588b" xlink:to="loc_fnf_EquitySecuritiesFVNIValuationGainLoss_07e80d3c-ddf3-49b3-aae5-ece3c21061a8" xlink:type="arc" order="10"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/InvestmentsCarryingValueandMaximumLossExposureofUnconsolidatedVIEsDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#InvestmentsCarryingValueandMaximumLossExposureofUnconsolidatedVIEsDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/InvestmentsCarryingValueandMaximumLossExposureofUnconsolidatedVIEsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfInvestmentsLineItems_a8ebe03f-8162-44d1-b522-4a7327c055b4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfInvestmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfInvestmentsTable_1de42a8d-c0a1-4b15-a62b-046b9e183707" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfInvestmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_a8ebe03f-8162-44d1-b522-4a7327c055b4" xlink:to="loc_us-gaap_ScheduleOfInvestmentsTable_1de42a8d-c0a1-4b15-a62b-046b9e183707" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeAxis_d014c3fc-b9fd-4b0d-964a-7617acd0a06a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfInvestmentsTable_1de42a8d-c0a1-4b15-a62b-046b9e183707" xlink:to="loc_us-gaap_InvestmentTypeAxis_d014c3fc-b9fd-4b0d-964a-7617acd0a06a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_d014c3fc-b9fd-4b0d-964a-7617acd0a06a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_InvestmentTypeAxis_d014c3fc-b9fd-4b0d-964a-7617acd0a06a" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_d014c3fc-b9fd-4b0d-964a-7617acd0a06a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentTypeCategorizationMember_61a90c9b-c99d-402b-a7b6-c523277ae0bb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentTypeCategorizationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_InvestmentTypeAxis_d014c3fc-b9fd-4b0d-964a-7617acd0a06a" xlink:to="loc_us-gaap_InvestmentTypeCategorizationMember_61a90c9b-c99d-402b-a7b6-c523277ae0bb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_LimitedPartnershipsMember_e6fae64c-54b5-4f5a-9a6b-6953c3ab4a10" xlink:href="fnf-20231231.xsd#fnf_LimitedPartnershipsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_61a90c9b-c99d-402b-a7b6-c523277ae0bb" xlink:to="loc_fnf_LimitedPartnershipsMember_e6fae64c-54b5-4f5a-9a6b-6953c3ab4a10" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FixedMaturitySecuritiesMember_c93215d8-9b7d-4502-a9a4-1b4478f0cd98" xlink:href="fnf-20231231.xsd#fnf_FixedMaturitySecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_InvestmentTypeCategorizationMember_61a90c9b-c99d-402b-a7b6-c523277ae0bb" xlink:to="loc_fnf_FixedMaturitySecuritiesMember_c93215d8-9b7d-4502-a9a4-1b4478f0cd98" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_InvestmentsOwnedVIEUnconsolidatedCarryingValue_29fe4e20-68cb-4906-8f84-700af95086bf" xlink:href="fnf-20231231.xsd#fnf_InvestmentsOwnedVIEUnconsolidatedCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_a8ebe03f-8162-44d1-b522-4a7327c055b4" xlink:to="loc_fnf_InvestmentsOwnedVIEUnconsolidatedCarryingValue_29fe4e20-68cb-4906-8f84-700af95086bf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount_772b4496-da67-4655-8d5c-8aa8ad6559c0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_a8ebe03f-8162-44d1-b522-4a7327c055b4" xlink:to="loc_us-gaap_VariableInterestEntityEntityMaximumLossExposureAmount_772b4496-da67-4655-8d5c-8aa8ad6559c0" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/InvestmentsScheduleofInvestmentConcentrationsDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#InvestmentsScheduleofInvestmentConcentrationsDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/InvestmentsScheduleofInvestmentConcentrationsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfInvestmentsLineItems_73beb006-934a-4564-a391-6144d16f51d8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfInvestmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfInvestmentsTable_2be70b60-d9ae-4786-8271-97913f62c8eb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfInvestmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_73beb006-934a-4564-a391-6144d16f51d8" xlink:to="loc_us-gaap_ScheduleOfInvestmentsTable_2be70b60-d9ae-4786-8271-97913f62c8eb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_ca59f3f0-8019-4495-b440-e0ba23e47e41" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfInvestmentsTable_2be70b60-d9ae-4786-8271-97913f62c8eb" xlink:to="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_ca59f3f0-8019-4495-b440-e0ba23e47e41" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_ca59f3f0-8019-4495-b440-e0ba23e47e41_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_ca59f3f0-8019-4495-b440-e0ba23e47e41" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_ca59f3f0-8019-4495-b440-e0ba23e47e41_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_EquityMethodInvesteeNameDomain_05529d08-f929-449a-a64b-b07b937fd148" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_EquityMethodInvesteeNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_ca59f3f0-8019-4495-b440-e0ba23e47e41" xlink:to="loc_srt_EquityMethodInvesteeNameDomain_05529d08-f929-449a-a64b-b07b937fd148" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_BlackstoneWaveMember_4b719e68-dfaf-4a02-b74d-3d01db807e9e" xlink:href="fnf-20231231.xsd#fnf_BlackstoneWaveMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_EquityMethodInvesteeNameDomain_05529d08-f929-449a-a64b-b07b937fd148" xlink:to="loc_fnf_BlackstoneWaveMember_4b719e68-dfaf-4a02-b74d-3d01db807e9e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_31420864-918a-4327-9aa4-5f7417712d93" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfInvestmentsTable_2be70b60-d9ae-4786-8271-97913f62c8eb" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_31420864-918a-4327-9aa4-5f7417712d93" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_31420864-918a-4327-9aa4-5f7417712d93_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_31420864-918a-4327-9aa4-5f7417712d93" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_31420864-918a-4327-9aa4-5f7417712d93_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_5799b6f8-d0ae-41aa-a2a6-a2efa9f20670" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_31420864-918a-4327-9aa4-5f7417712d93" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_5799b6f8-d0ae-41aa-a2a6-a2efa9f20670" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityTotalMember_0c628970-c185-4af7-8b76-49ad363f5a7b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockholdersEquityTotalMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_5799b6f8-d0ae-41aa-a2a6-a2efa9f20670" xlink:to="loc_us-gaap_StockholdersEquityTotalMember_0c628970-c185-4af7-8b76-49ad363f5a7b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_c46ffdcf-920c-41b1-b9e6-8e2216e6b8e2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfInvestmentsTable_2be70b60-d9ae-4786-8271-97913f62c8eb" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_c46ffdcf-920c-41b1-b9e6-8e2216e6b8e2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_c46ffdcf-920c-41b1-b9e6-8e2216e6b8e2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_c46ffdcf-920c-41b1-b9e6-8e2216e6b8e2" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_c46ffdcf-920c-41b1-b9e6-8e2216e6b8e2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_9bbbbe7c-c64d-4c75-a3cb-8f5acb562543" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_c46ffdcf-920c-41b1-b9e6-8e2216e6b8e2" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_9bbbbe7c-c64d-4c75-a3cb-8f5acb562543" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_InvestmentRiskConcentrationMember_de2fbd0b-5a62-4139-8ded-0e58f926a6f9" xlink:href="fnf-20231231.xsd#fnf_InvestmentRiskConcentrationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_9bbbbe7c-c64d-4c75-a3cb-8f5acb562543" xlink:to="loc_fnf_InvestmentRiskConcentrationMember_de2fbd0b-5a62-4139-8ded-0e58f926a6f9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentOwnedAtFairValue_6db4f031-3aa6-4a79-8d97-24a1625dca4e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentOwnedAtFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ScheduleOfInvestmentsLineItems_73beb006-934a-4564-a391-6144d16f51d8" xlink:to="loc_us-gaap_InvestmentOwnedAtFairValue_6db4f031-3aa6-4a79-8d97-24a1625dca4e" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/DerivativeFinancialInstrumentsCarryingAmountsofDerivativeInstrumentsDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#DerivativeFinancialInstrumentsCarryingAmountsofDerivativeInstrumentsDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/DerivativeFinancialInstrumentsCarryingAmountsofDerivativeInstrumentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLineItems_d54cbc50-39ed-49c4-8a7e-9da49288aa4a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeTable_28f6124e-ed72-43be-a3ef-6a36bc732e0e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeLineItems_d54cbc50-39ed-49c4-8a7e-9da49288aa4a" xlink:to="loc_us-gaap_DerivativeTable_28f6124e-ed72-43be-a3ef-6a36bc732e0e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_a35b3f4d-490e-449d-9214-b1c124991a0c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_28f6124e-ed72-43be-a3ef-6a36bc732e0e" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_a35b3f4d-490e-449d-9214-b1c124991a0c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_a35b3f4d-490e-449d-9214-b1c124991a0c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_a35b3f4d-490e-449d-9214-b1c124991a0c" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_a35b3f4d-490e-449d-9214-b1c124991a0c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_e39c615d-c209-46d8-840e-76843ee9256b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_a35b3f4d-490e-449d-9214-b1c124991a0c" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_e39c615d-c209-46d8-840e-76843ee9256b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CallOptionMember_f49c1ec9-97f2-4527-9fcb-fae55c61cd08" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CallOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_e39c615d-c209-46d8-840e-76843ee9256b" xlink:to="loc_us-gaap_CallOptionMember_f49c1ec9-97f2-4527-9fcb-fae55c61cd08" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateSwapMember_3cd47041-bc93-4c3c-ae80-089ed0adb773" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InterestRateSwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_e39c615d-c209-46d8-840e-76843ee9256b" xlink:to="loc_us-gaap_InterestRateSwapMember_3cd47041-bc93-4c3c-ae80-089ed0adb773" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeForwardMember_7fb27269-b676-4d45-84b1-5a635267d025" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ForeignExchangeForwardMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_e39c615d-c209-46d8-840e-76843ee9256b" xlink:to="loc_us-gaap_ForeignExchangeForwardMember_7fb27269-b676-4d45-84b1-5a635267d025" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmbeddedDerivativeFinancialInstrumentsMember_1770ef89-2493-49ab-9840-1014cc0e38a6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EmbeddedDerivativeFinancialInstrumentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_e39c615d-c209-46d8-840e-76843ee9256b" xlink:to="loc_us-gaap_EmbeddedDerivativeFinancialInstrumentsMember_1770ef89-2493-49ab-9840-1014cc0e38a6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_EmbeddedDerivativesinReinsuranceContractsMember_aff6f354-f9f7-4f10-80bb-3774838165f4" xlink:href="fnf-20231231.xsd#fnf_EmbeddedDerivativesinReinsuranceContractsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_e39c615d-c209-46d8-840e-76843ee9256b" xlink:to="loc_fnf_EmbeddedDerivativesinReinsuranceContractsMember_aff6f354-f9f7-4f10-80bb-3774838165f4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FixedAnnuityIULEmbeddedDerivativesLiabilitiesInContractHolderFundsMember_de42c32f-13cc-44c1-b7ad-c9197419a707" xlink:href="fnf-20231231.xsd#fnf_FixedAnnuityIULEmbeddedDerivativesLiabilitiesInContractHolderFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_e39c615d-c209-46d8-840e-76843ee9256b" xlink:to="loc_fnf_FixedAnnuityIULEmbeddedDerivativesLiabilitiesInContractHolderFundsMember_de42c32f-13cc-44c1-b7ad-c9197419a707" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_76d795bc-08b2-4b18-a34e-dfd3a4df4177" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BalanceSheetLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_28f6124e-ed72-43be-a3ef-6a36bc732e0e" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_76d795bc-08b2-4b18-a34e-dfd3a4df4177" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_76d795bc-08b2-4b18-a34e-dfd3a4df4177_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_76d795bc-08b2-4b18-a34e-dfd3a4df4177" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_76d795bc-08b2-4b18-a34e-dfd3a4df4177_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_ed922409-3e62-4c39-96e0-09640902a4bd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_76d795bc-08b2-4b18-a34e-dfd3a4df4177" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_ed922409-3e62-4c39-96e0-09640902a4bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_DerivativeInstrumentsMember_548d376c-a5fc-4c79-9538-129f328bcee6" xlink:href="fnf-20231231.xsd#fnf_DerivativeInstrumentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_ed922409-3e62-4c39-96e0-09640902a4bd" xlink:to="loc_fnf_DerivativeInstrumentsMember_548d376c-a5fc-4c79-9538-129f328bcee6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLongTermInvestmentsMember_6d3789ee-4935-4fdd-9e0d-950cc546f5cd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherLongTermInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_ed922409-3e62-4c39-96e0-09640902a4bd" xlink:to="loc_us-gaap_OtherLongTermInvestmentsMember_6d3789ee-4935-4fdd-9e0d-950cc546f5cd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember_cc920ec5-d554-4159-8c65-f6f8c7a703f2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_ed922409-3e62-4c39-96e0-09640902a4bd" xlink:to="loc_us-gaap_PrepaidExpensesAndOtherCurrentAssetsMember_cc920ec5-d554-4159-8c65-f6f8c7a703f2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractHolderFundsMember_b2fca55c-c64c-49d4-a0d4-d94c6e4ecad7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ContractHolderFundsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_ed922409-3e62-4c39-96e0-09640902a4bd" xlink:to="loc_us-gaap_ContractHolderFundsMember_b2fca55c-c64c-49d4-a0d4-d94c6e4ecad7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_dc02392c-b152-4bad-a8f7-69fe2bdea27f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_d54cbc50-39ed-49c4-8a7e-9da49288aa4a" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_dc02392c-b152-4bad-a8f7-69fe2bdea27f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_ccec4fcd-ca52-4d10-88f3-34e4afe96e49" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_d54cbc50-39ed-49c4-8a7e-9da49288aa4a" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeLiability_ccec4fcd-ca52-4d10-88f3-34e4afe96e49" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/DerivativeFinancialInstrumentsScheduleofChangeinFairValueofDerivativeInstrumentsDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#DerivativeFinancialInstrumentsScheduleofChangeinFairValueofDerivativeInstrumentsDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/DerivativeFinancialInstrumentsScheduleofChangeinFairValueofDerivativeInstrumentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLineItems_dac2e4f4-22c2-4d69-b0e0-ba13f64205a6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeTable_785164bb-491c-4c3f-a0ac-58e7410f3378" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeLineItems_dac2e4f4-22c2-4d69-b0e0-ba13f64205a6" xlink:to="loc_us-gaap_DerivativeTable_785164bb-491c-4c3f-a0ac-58e7410f3378" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_d65d8cac-5f5e-48d0-a664-31cf312bae98" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_785164bb-491c-4c3f-a0ac-58e7410f3378" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_d65d8cac-5f5e-48d0-a664-31cf312bae98" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_d65d8cac-5f5e-48d0-a664-31cf312bae98_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_d65d8cac-5f5e-48d0-a664-31cf312bae98" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_d65d8cac-5f5e-48d0-a664-31cf312bae98_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_f67ddefd-c35e-4448-91dd-57444df5efcd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_d65d8cac-5f5e-48d0-a664-31cf312bae98" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_f67ddefd-c35e-4448-91dd-57444df5efcd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CallOptionMember_84552687-5063-4de2-abd9-151093971826" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CallOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_f67ddefd-c35e-4448-91dd-57444df5efcd" xlink:to="loc_us-gaap_CallOptionMember_84552687-5063-4de2-abd9-151093971826" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestRateSwapMember_8c7f0f25-9383-40c4-a89c-3d4372a29776" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InterestRateSwapMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_f67ddefd-c35e-4448-91dd-57444df5efcd" xlink:to="loc_us-gaap_InterestRateSwapMember_8c7f0f25-9383-40c4-a89c-3d4372a29776" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FutureMember_f20f2dcd-9fec-4641-b66c-07af984feef1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FutureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_f67ddefd-c35e-4448-91dd-57444df5efcd" xlink:to="loc_us-gaap_FutureMember_f20f2dcd-9fec-4641-b66c-07af984feef1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignExchangeForwardMember_f8a4dd91-d9b1-487a-8a3b-e3bb2c598b00" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ForeignExchangeForwardMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_f67ddefd-c35e-4448-91dd-57444df5efcd" xlink:to="loc_us-gaap_ForeignExchangeForwardMember_f8a4dd91-d9b1-487a-8a3b-e3bb2c598b00" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmbeddedDerivativeFinancialInstrumentsMember_96d40098-6f53-4219-bded-5bfe8f870a80" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EmbeddedDerivativeFinancialInstrumentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_f67ddefd-c35e-4448-91dd-57444df5efcd" xlink:to="loc_us-gaap_EmbeddedDerivativeFinancialInstrumentsMember_96d40098-6f53-4219-bded-5bfe8f870a80" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_EmbeddedDerivativesinReinsuranceContractsMember_f7417c5a-dae3-407b-b279-4e3e368bc62d" xlink:href="fnf-20231231.xsd#fnf_EmbeddedDerivativesinReinsuranceContractsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_f67ddefd-c35e-4448-91dd-57444df5efcd" xlink:to="loc_fnf_EmbeddedDerivativesinReinsuranceContractsMember_f7417c5a-dae3-407b-b279-4e3e368bc62d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_TotalDerivativesNetMember_2c6ce79d-88f5-4c27-bd13-b928d049a798" xlink:href="fnf-20231231.xsd#fnf_TotalDerivativesNetMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_f67ddefd-c35e-4448-91dd-57444df5efcd" xlink:to="loc_fnf_TotalDerivativesNetMember_2c6ce79d-88f5-4c27-bd13-b928d049a798" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FixedAnnuityIULEmbeddedDerivativesMember_f0c27ef7-4e2d-4020-a5cb-e018383811ff" xlink:href="fnf-20231231.xsd#fnf_FixedAnnuityIULEmbeddedDerivativesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_f67ddefd-c35e-4448-91dd-57444df5efcd" xlink:to="loc_fnf_FixedAnnuityIULEmbeddedDerivativesMember_f0c27ef7-4e2d-4020-a5cb-e018383811ff" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeGainLossOnDerivativeNet_1b6fbb82-3ca5-4261-9598-733e206b8137" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeGainLossOnDerivativeNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_dac2e4f4-22c2-4d69-b0e0-ba13f64205a6" xlink:to="loc_us-gaap_DerivativeGainLossOnDerivativeNet_1b6fbb82-3ca5-4261-9598-733e206b8137" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/DerivativeFinancialInstrumentsNarrativeDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#DerivativeFinancialInstrumentsNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/DerivativeFinancialInstrumentsNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeLineItems_93ae4441-9bec-4572-a8c2-c4a04ae52b09" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeTable_343bc124-5058-4a12-873f-fbe76f5ed9ac" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativeLineItems_93ae4441-9bec-4572-a8c2-c4a04ae52b09" xlink:to="loc_us-gaap_DerivativeTable_343bc124-5058-4a12-873f-fbe76f5ed9ac" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_e2c72452-db98-4881-a650-aa82ed40fba3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_343bc124-5058-4a12-873f-fbe76f5ed9ac" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_e2c72452-db98-4881-a650-aa82ed40fba3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_e2c72452-db98-4881-a650-aa82ed40fba3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_e2c72452-db98-4881-a650-aa82ed40fba3" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_e2c72452-db98-4881-a650-aa82ed40fba3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_08122070-d79c-4f94-9a24-294ced9b6415" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_e2c72452-db98-4881-a650-aa82ed40fba3" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_08122070-d79c-4f94-9a24-294ced9b6415" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmbeddedDerivativeFinancialInstrumentsMember_73a3206c-fe93-4d91-b20a-59e8851783d8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EmbeddedDerivativeFinancialInstrumentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_08122070-d79c-4f94-9a24-294ced9b6415" xlink:to="loc_us-gaap_EmbeddedDerivativeFinancialInstrumentsMember_73a3206c-fe93-4d91-b20a-59e8851783d8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CallOptionMember_d264af8c-d63c-4862-84f7-a12f0cb49820" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CallOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_08122070-d79c-4f94-9a24-294ced9b6415" xlink:to="loc_us-gaap_CallOptionMember_d264af8c-d63c-4862-84f7-a12f0cb49820" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FutureMember_d8c5d500-2436-426b-be3e-6a7b205a1bde" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FutureMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_08122070-d79c-4f94-9a24-294ced9b6415" xlink:to="loc_us-gaap_FutureMember_d8c5d500-2436-426b-be3e-6a7b205a1bde" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationAxis_b943c115-2129-4e99-b9a7-ac168a8fc574" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BalanceSheetLocationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_343bc124-5058-4a12-873f-fbe76f5ed9ac" xlink:to="loc_us-gaap_BalanceSheetLocationAxis_b943c115-2129-4e99-b9a7-ac168a8fc574" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_b943c115-2129-4e99-b9a7-ac168a8fc574_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_b943c115-2129-4e99-b9a7-ac168a8fc574" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_b943c115-2129-4e99-b9a7-ac168a8fc574_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BalanceSheetLocationDomain_ee8de0f3-1bf6-4f34-8aa4-d5e74891003c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BalanceSheetLocationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BalanceSheetLocationAxis_b943c115-2129-4e99-b9a7-ac168a8fc574" xlink:to="loc_us-gaap_BalanceSheetLocationDomain_ee8de0f3-1bf6-4f34-8aa4-d5e74891003c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_DerivativesForTradingAndInvestmentMember_11952c42-c03a-4a45-add5-422da3cbbf4e" xlink:href="fnf-20231231.xsd#fnf_DerivativesForTradingAndInvestmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_ee8de0f3-1bf6-4f34-8aa4-d5e74891003c" xlink:to="loc_fnf_DerivativesForTradingAndInvestmentMember_11952c42-c03a-4a45-add5-422da3cbbf4e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsMember_54875e9e-255c-4893-9517-32d6e82e6122" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CashAndCashEquivalentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BalanceSheetLocationDomain_ee8de0f3-1bf6-4f34-8aa4-d5e74891003c" xlink:to="loc_us-gaap_CashAndCashEquivalentsMember_54875e9e-255c-4893-9517-32d6e82e6122" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_5cada4f4-c34a-4add-b769-e48b8235290d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_343bc124-5058-4a12-873f-fbe76f5ed9ac" xlink:to="loc_us-gaap_HedgingDesignationAxis_5cada4f4-c34a-4add-b769-e48b8235290d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_5cada4f4-c34a-4add-b769-e48b8235290d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_5cada4f4-c34a-4add-b769-e48b8235290d" xlink:to="loc_us-gaap_HedgingDesignationDomain_5cada4f4-c34a-4add-b769-e48b8235290d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_b3bbc771-b6a5-4444-8a53-a80fc5ff4bfd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_5cada4f4-c34a-4add-b769-e48b8235290d" xlink:to="loc_us-gaap_HedgingDesignationDomain_b3bbc771-b6a5-4444-8a53-a80fc5ff4bfd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_8a3a89d3-d1c6-4f2d-b92f-ca9a3030a3c1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NondesignatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_b3bbc771-b6a5-4444-8a53-a80fc5ff4bfd" xlink:to="loc_us-gaap_NondesignatedMember_8a3a89d3-d1c6-4f2d-b92f-ca9a3030a3c1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_64db6de7-a06b-4946-8013-14a811e6cc78" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DerivativeTable_343bc124-5058-4a12-873f-fbe76f5ed9ac" xlink:to="loc_srt_CounterpartyNameAxis_64db6de7-a06b-4946-8013-14a811e6cc78" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_64db6de7-a06b-4946-8013-14a811e6cc78_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_64db6de7-a06b-4946-8013-14a811e6cc78" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_64db6de7-a06b-4946-8013-14a811e6cc78_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_386a6f4d-0768-4ee0-b443-52baa48a6a9f" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_64db6de7-a06b-4946-8013-14a811e6cc78" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_386a6f4d-0768-4ee0-b443-52baa48a6a9f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_AllCounterpartiesExceptMerrillLynchMember_cea5a009-e29f-48db-8215-a5b852f310fb" xlink:href="fnf-20231231.xsd#fnf_AllCounterpartiesExceptMerrillLynchMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_386a6f4d-0768-4ee0-b443-52baa48a6a9f" xlink:to="loc_fnf_AllCounterpartiesExceptMerrillLynchMember_cea5a009-e29f-48db-8215-a5b852f310fb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_DerivativeTermofContractTermOne_fa64969f-fa06-464e-80bd-93c51fd482ea" xlink:href="fnf-20231231.xsd#fnf_DerivativeTermofContractTermOne"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_93ae4441-9bec-4572-a8c2-c4a04ae52b09" xlink:to="loc_fnf_DerivativeTermofContractTermOne_fa64969f-fa06-464e-80bd-93c51fd482ea" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_DerivativeTermofContractTermTwo_fdf6d4ed-2a01-4435-bfa7-9583f640ab11" xlink:href="fnf-20231231.xsd#fnf_DerivativeTermofContractTermTwo"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_93ae4441-9bec-4572-a8c2-c4a04ae52b09" xlink:to="loc_fnf_DerivativeTermofContractTermTwo_fdf6d4ed-2a01-4435-bfa7-9583f640ab11" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_DerivativeTermofContractTermThree_ed26a29e-d7d2-48a6-858d-547c21a5487e" xlink:href="fnf-20231231.xsd#fnf_DerivativeTermofContractTermThree"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_93ae4441-9bec-4572-a8c2-c4a04ae52b09" xlink:to="loc_fnf_DerivativeTermofContractTermThree_ed26a29e-d7d2-48a6-858d-547c21a5487e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_DerivativeTermOfContractTermFive_1eb47b52-bff5-4712-988f-0ea697cd3d4d" xlink:href="fnf-20231231.xsd#fnf_DerivativeTermOfContractTermFive"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_93ae4441-9bec-4572-a8c2-c4a04ae52b09" xlink:to="loc_fnf_DerivativeTermOfContractTermFive_1eb47b52-bff5-4712-988f-0ea697cd3d4d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_DerivativesCollateralNetExposureThresholdForWhichCollateralRequired_e5c58bf3-a261-4a95-bac0-76eea6cdba9c" xlink:href="fnf-20231231.xsd#fnf_DerivativesCollateralNetExposureThresholdForWhichCollateralRequired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_93ae4441-9bec-4572-a8c2-c4a04ae52b09" xlink:to="loc_fnf_DerivativesCollateralNetExposureThresholdForWhichCollateralRequired_e5c58bf3-a261-4a95-bac0-76eea6cdba9c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetCollateralObligationToReturnCashOffset_360e9b30-55ba-4451-9c61-83ffded3d380" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeAssetCollateralObligationToReturnCashOffset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_93ae4441-9bec-4572-a8c2-c4a04ae52b09" xlink:to="loc_us-gaap_DerivativeAssetCollateralObligationToReturnCashOffset_360e9b30-55ba-4451-9c61-83ffded3d380" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral_e6fb1d7f-a6d7-4d17-a8a5-fbfd846e9801" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_93ae4441-9bec-4572-a8c2-c4a04ae52b09" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral_e6fb1d7f-a6d7-4d17-a8a5-fbfd846e9801" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNumberOfInstrumentsHeld_f20ab779-1a28-4502-ba55-857722a8a65c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeNumberOfInstrumentsHeld"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_93ae4441-9bec-4572-a8c2-c4a04ae52b09" xlink:to="loc_us-gaap_DerivativeNumberOfInstrumentsHeld_f20ab779-1a28-4502-ba55-857722a8a65c" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CollateralAlreadyPostedAggregateFairValue_25859483-bc3e-47f4-bdda-d7caa3ccaa5b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CollateralAlreadyPostedAggregateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeLineItems_93ae4441-9bec-4572-a8c2-c4a04ae52b09" xlink:to="loc_us-gaap_CollateralAlreadyPostedAggregateFairValue_25859483-bc3e-47f4-bdda-d7caa3ccaa5b" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/DerivativeFinancialInstrumentsExposuretoCreditLossonCallOptionsHeldDetail" xlink:type="simple" xlink:href="fnf-20231231.xsd#DerivativeFinancialInstrumentsExposuretoCreditLossonCallOptionsHeldDetail"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/DerivativeFinancialInstrumentsExposuretoCreditLossonCallOptionsHeldDetail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativesFairValueLineItems_064defc6-8a6c-4a46-81b5-839402394a52" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativesFairValueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_3febf53c-f9eb-48b9-b88b-29f9c8b3d083" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_064defc6-8a6c-4a46-81b5-839402394a52" xlink:to="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_3febf53c-f9eb-48b9-b88b-29f9c8b3d083" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationAxis_9a8b5ed5-6923-480c-a3bc-73c8ffe89dc9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_HedgingDesignationAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_3febf53c-f9eb-48b9-b88b-29f9c8b3d083" xlink:to="loc_us-gaap_HedgingDesignationAxis_9a8b5ed5-6923-480c-a3bc-73c8ffe89dc9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_9a8b5ed5-6923-480c-a3bc-73c8ffe89dc9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_HedgingDesignationAxis_9a8b5ed5-6923-480c-a3bc-73c8ffe89dc9" xlink:to="loc_us-gaap_HedgingDesignationDomain_9a8b5ed5-6923-480c-a3bc-73c8ffe89dc9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_HedgingDesignationDomain_2702700b-f82c-4b29-96ec-0181a96a2283" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_HedgingDesignationDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_HedgingDesignationAxis_9a8b5ed5-6923-480c-a3bc-73c8ffe89dc9" xlink:to="loc_us-gaap_HedgingDesignationDomain_2702700b-f82c-4b29-96ec-0181a96a2283" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NondesignatedMember_84a9b3c8-5bc2-4f2d-8f24-16a243fc503a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NondesignatedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_HedgingDesignationDomain_2702700b-f82c-4b29-96ec-0181a96a2283" xlink:to="loc_us-gaap_NondesignatedMember_84a9b3c8-5bc2-4f2d-8f24-16a243fc503a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeInstrumentRiskAxis_149b963d-c54c-45f3-b9eb-488808340f83" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeInstrumentRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_3febf53c-f9eb-48b9-b88b-29f9c8b3d083" xlink:to="loc_us-gaap_DerivativeInstrumentRiskAxis_149b963d-c54c-45f3-b9eb-488808340f83" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_149b963d-c54c-45f3-b9eb-488808340f83_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_149b963d-c54c-45f3-b9eb-488808340f83" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_149b963d-c54c-45f3-b9eb-488808340f83_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeContractTypeDomain_bf5efbea-9664-4b65-a452-e77d384b6534" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeContractTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DerivativeInstrumentRiskAxis_149b963d-c54c-45f3-b9eb-488808340f83" xlink:to="loc_us-gaap_DerivativeContractTypeDomain_bf5efbea-9664-4b65-a452-e77d384b6534" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CallOptionMember_ad07043f-97ac-486d-8875-b4c939b974ee" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CallOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativeContractTypeDomain_bf5efbea-9664-4b65-a452-e77d384b6534" xlink:to="loc_us-gaap_CallOptionMember_ad07043f-97ac-486d-8875-b4c939b974ee" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CounterpartyNameAxis_2247966f-0a37-4a19-826c-d870dba45f84" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_CounterpartyNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_FairValuesDerivativesBalanceSheetLocationByDerivativeContractTypeByHedgingDesignationTable_3febf53c-f9eb-48b9-b88b-29f9c8b3d083" xlink:to="loc_srt_CounterpartyNameAxis_2247966f-0a37-4a19-826c-d870dba45f84" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_2247966f-0a37-4a19-826c-d870dba45f84_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CounterpartyNameAxis_2247966f-0a37-4a19-826c-d870dba45f84" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_2247966f-0a37-4a19-826c-d870dba45f84_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RepurchaseAgreementCounterpartyNameDomain_f2e112fd-5de2-4a4b-adf8-63feaae5cbbf" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RepurchaseAgreementCounterpartyNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CounterpartyNameAxis_2247966f-0a37-4a19-826c-d870dba45f84" xlink:to="loc_srt_RepurchaseAgreementCounterpartyNameDomain_f2e112fd-5de2-4a4b-adf8-63feaae5cbbf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_MerrillLynchMember_2357293a-78ae-44bf-82f7-dad9950f0ecd" xlink:href="fnf-20231231.xsd#fnf_MerrillLynchMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_f2e112fd-5de2-4a4b-adf8-63feaae5cbbf" xlink:to="loc_fnf_MerrillLynchMember_2357293a-78ae-44bf-82f7-dad9950f0ecd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_MorganStanleyMember_d0e482c9-c50e-4f25-912c-9dc8a4cead01" xlink:href="fnf-20231231.xsd#fnf_MorganStanleyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_f2e112fd-5de2-4a4b-adf8-63feaae5cbbf" xlink:to="loc_fnf_MorganStanleyMember_d0e482c9-c50e-4f25-912c-9dc8a4cead01" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_BarclaysBankMember_ad24b060-347a-41df-8e5f-7788808f9e44" xlink:href="fnf-20231231.xsd#fnf_BarclaysBankMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_f2e112fd-5de2-4a4b-adf8-63feaae5cbbf" xlink:to="loc_fnf_BarclaysBankMember_ad24b060-347a-41df-8e5f-7788808f9e44" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_CanadianImperialBankofCommerceMember_93bac90d-6b79-479e-bfd2-ead0d4eab6dd" xlink:href="fnf-20231231.xsd#fnf_CanadianImperialBankofCommerceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_f2e112fd-5de2-4a4b-adf8-63feaae5cbbf" xlink:to="loc_fnf_CanadianImperialBankofCommerceMember_93bac90d-6b79-479e-bfd2-ead0d4eab6dd" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_WellsFargoMember_edd5e41c-e8a3-431e-8238-0c4093ffb928" xlink:href="fnf-20231231.xsd#fnf_WellsFargoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_f2e112fd-5de2-4a4b-adf8-63feaae5cbbf" xlink:to="loc_fnf_WellsFargoMember_edd5e41c-e8a3-431e-8238-0c4093ffb928" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_GoldmanSachsMember_0b9da134-fea0-4708-a324-58763a289eba" xlink:href="fnf-20231231.xsd#fnf_GoldmanSachsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_f2e112fd-5de2-4a4b-adf8-63feaae5cbbf" xlink:to="loc_fnf_GoldmanSachsMember_0b9da134-fea0-4708-a324-58763a289eba" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_CreditSuisseMember_04fafaef-8bea-4477-8c70-d6d11c3b1b6e" xlink:href="fnf-20231231.xsd#fnf_CreditSuisseMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_f2e112fd-5de2-4a4b-adf8-63feaae5cbbf" xlink:to="loc_fnf_CreditSuisseMember_04fafaef-8bea-4477-8c70-d6d11c3b1b6e" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_TruistMember_835940f9-2cff-4bba-a8cb-88a61bd38fd4" xlink:href="fnf-20231231.xsd#fnf_TruistMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_f2e112fd-5de2-4a4b-adf8-63feaae5cbbf" xlink:to="loc_fnf_TruistMember_835940f9-2cff-4bba-a8cb-88a61bd38fd4" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_CitibankMember_d85cad61-15f5-4d82-ad53-ba8b9b5a92a0" xlink:href="fnf-20231231.xsd#fnf_CitibankMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_f2e112fd-5de2-4a4b-adf8-63feaae5cbbf" xlink:to="loc_fnf_CitibankMember_d85cad61-15f5-4d82-ad53-ba8b9b5a92a0" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_JPMorganMember_f5a19d5c-1c0a-4bc2-a658-bd247f6b0e7c" xlink:href="fnf-20231231.xsd#fnf_JPMorganMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RepurchaseAgreementCounterpartyNameDomain_f2e112fd-5de2-4a4b-adf8-63feaae5cbbf" xlink:to="loc_fnf_JPMorganMember_f5a19d5c-1c0a-4bc2-a658-bd247f6b0e7c" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeNotionalAmount_a0881f43-b467-4d47-912b-5134dbec9ca2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeNotionalAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_064defc6-8a6c-4a46-81b5-839402394a52" xlink:to="loc_us-gaap_DerivativeNotionalAmount_a0881f43-b467-4d47-912b-5134dbec9ca2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_4ae151a9-ad34-4003-97c8-f328bfb56d6e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_064defc6-8a6c-4a46-81b5-839402394a52" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAsset_4ae151a9-ad34-4003-97c8-f328bfb56d6e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeAssetCollateralObligationToReturnCashOffset_bd48f470-8b77-4e05-952c-f16ce79be05d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeAssetCollateralObligationToReturnCashOffset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_064defc6-8a6c-4a46-81b5-839402394a52" xlink:to="loc_us-gaap_DerivativeAssetCollateralObligationToReturnCashOffset_bd48f470-8b77-4e05-952c-f16ce79be05d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral_0dc1b44f-2bf6-4f66-818b-55c7967f99ae" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DerivativesFairValueLineItems_064defc6-8a6c-4a46-81b5-839402394a52" xlink:to="loc_us-gaap_DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral_0dc1b44f-2bf6-4f66-818b-55c7967f99ae" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/NotesPayableScheduleofLongTermDebtDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#NotesPayableScheduleofLongTermDebtDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/NotesPayableScheduleofLongTermDebtDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_3dc415af-d576-4cfe-b00d-59c8a798c378" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_f05f5ce0-f382-4ef2-b054-f92fc4e30945" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3dc415af-d576-4cfe-b00d-59c8a798c378" xlink:to="loc_us-gaap_DebtInstrumentTable_f05f5ce0-f382-4ef2-b054-f92fc4e30945" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_db4e9249-12b1-47b9-b92d-e063f29e73b4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_f05f5ce0-f382-4ef2-b054-f92fc4e30945" xlink:to="loc_us-gaap_DebtInstrumentAxis_db4e9249-12b1-47b9-b92d-e063f29e73b4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_db4e9249-12b1-47b9-b92d-e063f29e73b4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_db4e9249-12b1-47b9-b92d-e063f29e73b4" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_db4e9249-12b1-47b9-b92d-e063f29e73b4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_ffe97736-6b56-4437-b50a-c4bd6879b942" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_db4e9249-12b1-47b9-b92d-e063f29e73b4" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_ffe97736-6b56-4437-b50a-c4bd6879b942" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FourPointFiveZeroPercentUnsecuredNotesDueAugust2028Member_b8ba5140-a025-4992-9966-138a6e45dfc7" xlink:href="fnf-20231231.xsd#fnf_FourPointFiveZeroPercentUnsecuredNotesDueAugust2028Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_ffe97736-6b56-4437-b50a-c4bd6879b942" xlink:to="loc_fnf_FourPointFiveZeroPercentUnsecuredNotesDueAugust2028Member_b8ba5140-a025-4992-9966-138a6e45dfc7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_ThreePointFourZeroPercentUnsecuredNotesDueSeptember2022Member_0a701d80-71f2-4449-b960-9339804498b8" xlink:href="fnf-20231231.xsd#fnf_ThreePointFourZeroPercentUnsecuredNotesDueSeptember2022Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_ffe97736-6b56-4437-b50a-c4bd6879b942" xlink:to="loc_fnf_ThreePointFourZeroPercentUnsecuredNotesDueSeptember2022Member_0a701d80-71f2-4449-b960-9339804498b8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_Notes245Member_2c322a66-684e-4afc-bd3d-cdf615bf72dc" xlink:href="fnf-20231231.xsd#fnf_Notes245Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_ffe97736-6b56-4437-b50a-c4bd6879b942" xlink:to="loc_fnf_Notes245Member_2c322a66-684e-4afc-bd3d-cdf615bf72dc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_A320SeniorNotesMember_3f6aabb3-7ed8-419e-95c4-ad598d6763be" xlink:href="fnf-20231231.xsd#fnf_A320SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_ffe97736-6b56-4437-b50a-c4bd6879b942" xlink:to="loc_fnf_A320SeniorNotesMember_3f6aabb3-7ed8-419e-95c4-ad598d6763be" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_RevolvingCreditFacilityDueApril2022Member_1bbfe285-1ad6-469f-ad5b-78f3d8d68744" xlink:href="fnf-20231231.xsd#fnf_RevolvingCreditFacilityDueApril2022Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_ffe97736-6b56-4437-b50a-c4bd6879b942" xlink:to="loc_fnf_RevolvingCreditFacilityDueApril2022Member_1bbfe285-1ad6-469f-ad5b-78f3d8d68744" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FGCreditAgreementMember_29997ded-b827-4a44-92e6-fb4e1c8549c4" xlink:href="fnf-20231231.xsd#fnf_FGCreditAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_ffe97736-6b56-4437-b50a-c4bd6879b942" xlink:to="loc_fnf_FGCreditAgreementMember_29997ded-b827-4a44-92e6-fb4e1c8549c4" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_A550FGNotesMember_03ebfb12-63e3-4544-bf2d-bb53b3c1c83e" xlink:href="fnf-20231231.xsd#fnf_A550FGNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_ffe97736-6b56-4437-b50a-c4bd6879b942" xlink:to="loc_fnf_A550FGNotesMember_03ebfb12-63e3-4544-bf2d-bb53b3c1c83e" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_A740SeniorNotesDue2028Member_3f5b9d28-34a5-4482-8145-56a908742ec8" xlink:href="fnf-20231231.xsd#fnf_A740SeniorNotesDue2028Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_ffe97736-6b56-4437-b50a-c4bd6879b942" xlink:to="loc_fnf_A740SeniorNotesDue2028Member_3f5b9d28-34a5-4482-8145-56a908742ec8" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_A795SeniorNotesDue2053Member_1fcca09f-2810-4f8a-ae98-4c918fd25495" xlink:href="fnf-20231231.xsd#fnf_A795SeniorNotesDue2053Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_ffe97736-6b56-4437-b50a-c4bd6879b942" xlink:to="loc_fnf_A795SeniorNotesDue2053Member_1fcca09f-2810-4f8a-ae98-4c918fd25495" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_OtherLongTermDebtMember_32766206-d55a-4377-b1f9-ba3833b891a8" xlink:href="fnf-20231231.xsd#fnf_OtherLongTermDebtMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_ffe97736-6b56-4437-b50a-c4bd6879b942" xlink:to="loc_fnf_OtherLongTermDebtMember_32766206-d55a-4377-b1f9-ba3833b891a8" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_c43e3758-cdb4-4754-b2cd-ff7adce65fe3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_f05f5ce0-f382-4ef2-b054-f92fc4e30945" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_c43e3758-cdb4-4754-b2cd-ff7adce65fe3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_c43e3758-cdb4-4754-b2cd-ff7adce65fe3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_c43e3758-cdb4-4754-b2cd-ff7adce65fe3" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_c43e3758-cdb4-4754-b2cd-ff7adce65fe3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_a17f8fc7-3139-4f73-b6da-f373c03eb6ed" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_c43e3758-cdb4-4754-b2cd-ff7adce65fe3" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_a17f8fc7-3139-4f73-b6da-f373c03eb6ed" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_ecf0043e-94e7-49cc-becf-160d0e80f443" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_a17f8fc7-3139-4f73-b6da-f373c03eb6ed" xlink:to="loc_us-gaap_SeniorNotesMember_ecf0043e-94e7-49cc-becf-160d0e80f443" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_7f3be637-c267-4ba8-b1e1-bf476808aa94" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_a17f8fc7-3139-4f73-b6da-f373c03eb6ed" xlink:to="loc_us-gaap_LineOfCreditMember_7f3be637-c267-4ba8-b1e1-bf476808aa94" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_274526dd-d3f8-476e-a8fe-9cebe34edee5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_f05f5ce0-f382-4ef2-b054-f92fc4e30945" xlink:to="loc_us-gaap_CreditFacilityAxis_274526dd-d3f8-476e-a8fe-9cebe34edee5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_274526dd-d3f8-476e-a8fe-9cebe34edee5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_274526dd-d3f8-476e-a8fe-9cebe34edee5" xlink:to="loc_us-gaap_CreditFacilityDomain_274526dd-d3f8-476e-a8fe-9cebe34edee5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_49d6da8e-12a6-4a0b-9979-b89ef1ec1e21" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_274526dd-d3f8-476e-a8fe-9cebe34edee5" xlink:to="loc_us-gaap_CreditFacilityDomain_49d6da8e-12a6-4a0b-9979-b89ef1ec1e21" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_389394a4-a5e4-449f-bd94-b3054c63cc13" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_49d6da8e-12a6-4a0b-9979-b89ef1ec1e21" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_389394a4-a5e4-449f-bd94-b3054c63cc13" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_6882ae58-628d-4ba5-9042-fa04033ef9ef" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3dc415af-d576-4cfe-b00d-59c8a798c378" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_6882ae58-628d-4ba5-9042-fa04033ef9ef" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_90c58e29-c022-447d-b259-5fbb5462caf8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_3dc415af-d576-4cfe-b00d-59c8a798c378" xlink:to="loc_us-gaap_LongTermDebt_90c58e29-c022-447d-b259-5fbb5462caf8" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/NotesPayableNarrativeDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#NotesPayableNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/NotesPayableNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_210a8878-c2b9-4fc9-bbb5-ca46a72c30a0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_24f5e177-53bc-4522-a5df-66190e284cfc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_210a8878-c2b9-4fc9-bbb5-ca46a72c30a0" xlink:to="loc_us-gaap_DebtInstrumentTable_24f5e177-53bc-4522-a5df-66190e284cfc" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_2262bc41-ff27-4ba1-b527-57bd16b47761" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_24f5e177-53bc-4522-a5df-66190e284cfc" xlink:to="loc_us-gaap_DebtInstrumentAxis_2262bc41-ff27-4ba1-b527-57bd16b47761" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_2262bc41-ff27-4ba1-b527-57bd16b47761_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_2262bc41-ff27-4ba1-b527-57bd16b47761" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_2262bc41-ff27-4ba1-b527-57bd16b47761_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_f9a0db6b-8bb8-4569-a578-f3d693c8a1e1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_2262bc41-ff27-4ba1-b527-57bd16b47761" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_f9a0db6b-8bb8-4569-a578-f3d693c8a1e1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_A795SeniorNotesDue2053Member_73e0ec5c-098e-4b83-8d30-4b809c5d0a59" xlink:href="fnf-20231231.xsd#fnf_A795SeniorNotesDue2053Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_f9a0db6b-8bb8-4569-a578-f3d693c8a1e1" xlink:to="loc_fnf_A795SeniorNotesDue2053Member_73e0ec5c-098e-4b83-8d30-4b809c5d0a59" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_A740SeniorNotesDue2028Member_8d5dc391-8af7-46e8-ac12-52efa354f585" xlink:href="fnf-20231231.xsd#fnf_A740SeniorNotesDue2028Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_f9a0db6b-8bb8-4569-a578-f3d693c8a1e1" xlink:to="loc_fnf_A740SeniorNotesDue2028Member_8d5dc391-8af7-46e8-ac12-52efa354f585" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FGCreditAgreementMember_ebbb25d2-af47-45f3-8a4f-7e8057a0384d" xlink:href="fnf-20231231.xsd#fnf_FGCreditAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_f9a0db6b-8bb8-4569-a578-f3d693c8a1e1" xlink:to="loc_fnf_FGCreditAgreementMember_ebbb25d2-af47-45f3-8a4f-7e8057a0384d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_A550FGSeniorNotesDue2025Member_a92fc813-f63c-4112-8c64-b5bdddd38099" xlink:href="fnf-20231231.xsd#fnf_A550FGSeniorNotesDue2025Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_f9a0db6b-8bb8-4569-a578-f3d693c8a1e1" xlink:to="loc_fnf_A550FGSeniorNotesDue2025Member_a92fc813-f63c-4112-8c64-b5bdddd38099" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_A320SeniorNotesMember_ebca95f9-8e68-4141-a2b1-08559ea54fc5" xlink:href="fnf-20231231.xsd#fnf_A320SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_f9a0db6b-8bb8-4569-a578-f3d693c8a1e1" xlink:to="loc_fnf_A320SeniorNotesMember_ebca95f9-8e68-4141-a2b1-08559ea54fc5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_RevolvingCreditFacilityDueApril2022Member_45bdd87c-1eb5-4f86-8fcb-a65bc40a62a5" xlink:href="fnf-20231231.xsd#fnf_RevolvingCreditFacilityDueApril2022Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_f9a0db6b-8bb8-4569-a578-f3d693c8a1e1" xlink:to="loc_fnf_RevolvingCreditFacilityDueApril2022Member_45bdd87c-1eb5-4f86-8fcb-a65bc40a62a5" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_A245SeniorNotesDueMarch2031Member_36a8b4d5-bc6b-413f-9307-84aeeb2eb1ff" xlink:href="fnf-20231231.xsd#fnf_A245SeniorNotesDueMarch2031Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_f9a0db6b-8bb8-4569-a578-f3d693c8a1e1" xlink:to="loc_fnf_A245SeniorNotesDueMarch2031Member_36a8b4d5-bc6b-413f-9307-84aeeb2eb1ff" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_TermLoanCreditAgreementMember_bdfa3d05-03ec-449b-87c5-6b751cc3c3f4" xlink:href="fnf-20231231.xsd#fnf_TermLoanCreditAgreementMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_f9a0db6b-8bb8-4569-a578-f3d693c8a1e1" xlink:to="loc_fnf_TermLoanCreditAgreementMember_bdfa3d05-03ec-449b-87c5-6b751cc3c3f4" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_A340NotesDueJune152030Member_000c3baa-2b3d-462e-b61f-d9f02c741ac2" xlink:href="fnf-20231231.xsd#fnf_A340NotesDueJune152030Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_f9a0db6b-8bb8-4569-a578-f3d693c8a1e1" xlink:to="loc_fnf_A340NotesDueJune152030Member_000c3baa-2b3d-462e-b61f-d9f02c741ac2" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FourPointFiveZeroPercentUnsecuredNotesDueAugust2028Member_3fb6d889-7c6d-4ab3-9864-76d67a584efb" xlink:href="fnf-20231231.xsd#fnf_FourPointFiveZeroPercentUnsecuredNotesDueAugust2028Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_f9a0db6b-8bb8-4569-a578-f3d693c8a1e1" xlink:to="loc_fnf_FourPointFiveZeroPercentUnsecuredNotesDueAugust2028Member_3fb6d889-7c6d-4ab3-9864-76d67a584efb" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_ab5064c7-c092-448b-807b-0c6e974a6314" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_24f5e177-53bc-4522-a5df-66190e284cfc" xlink:to="loc_us-gaap_CreditFacilityAxis_ab5064c7-c092-448b-807b-0c6e974a6314" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_ab5064c7-c092-448b-807b-0c6e974a6314_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_ab5064c7-c092-448b-807b-0c6e974a6314" xlink:to="loc_us-gaap_CreditFacilityDomain_ab5064c7-c092-448b-807b-0c6e974a6314_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_30e7fae9-253e-40b9-b6e8-13b0af9bf143" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_ab5064c7-c092-448b-807b-0c6e974a6314" xlink:to="loc_us-gaap_CreditFacilityDomain_30e7fae9-253e-40b9-b6e8-13b0af9bf143" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_20c3e6a6-04b1-46e2-ad94-9fdd034f1825" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_30e7fae9-253e-40b9-b6e8-13b0af9bf143" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_20c3e6a6-04b1-46e2-ad94-9fdd034f1825" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_e67018fa-08b5-4817-a2c1-472b06fa26b0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_24f5e177-53bc-4522-a5df-66190e284cfc" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_e67018fa-08b5-4817-a2c1-472b06fa26b0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_e67018fa-08b5-4817-a2c1-472b06fa26b0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_e67018fa-08b5-4817-a2c1-472b06fa26b0" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_e67018fa-08b5-4817-a2c1-472b06fa26b0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_a7edd8ea-2cb8-4aaf-92bb-8cf3077a887c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_e67018fa-08b5-4817-a2c1-472b06fa26b0" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_a7edd8ea-2cb8-4aaf-92bb-8cf3077a887c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_7f4d9055-4ed6-4d25-b5fc-ad07f925bdf2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_a7edd8ea-2cb8-4aaf-92bb-8cf3077a887c" xlink:to="loc_us-gaap_LineOfCreditMember_7f4d9055-4ed6-4d25-b5fc-ad07f925bdf2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SeniorNotesMember_713ebe70-68a3-43de-83cd-517183992fd3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_a7edd8ea-2cb8-4aaf-92bb-8cf3077a887c" xlink:to="loc_us-gaap_SeniorNotesMember_713ebe70-68a3-43de-83cd-517183992fd3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_TermLoanMember_44ef148a-6ea7-43c8-805d-e7ed82f6615e" xlink:href="fnf-20231231.xsd#fnf_TermLoanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_a7edd8ea-2cb8-4aaf-92bb-8cf3077a887c" xlink:to="loc_fnf_TermLoanMember_44ef148a-6ea7-43c8-805d-e7ed82f6615e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_50984545-db9a-4975-8042-d0eafb36ef75" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_24f5e177-53bc-4522-a5df-66190e284cfc" xlink:to="loc_srt_RangeAxis_50984545-db9a-4975-8042-d0eafb36ef75" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_50984545-db9a-4975-8042-d0eafb36ef75_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_50984545-db9a-4975-8042-d0eafb36ef75" xlink:to="loc_srt_RangeMember_50984545-db9a-4975-8042-d0eafb36ef75_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_e8ca3961-2b1b-41c7-8cb9-8436705c2797" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_50984545-db9a-4975-8042-d0eafb36ef75" xlink:to="loc_srt_RangeMember_e8ca3961-2b1b-41c7-8cb9-8436705c2797" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_ec7de478-fb87-42fd-b852-439179f70605" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_e8ca3961-2b1b-41c7-8cb9-8436705c2797" xlink:to="loc_srt_MinimumMember_ec7de478-fb87-42fd-b852-439179f70605" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_d8a4c21c-1367-4a4c-a94b-3e040bb81478" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_e8ca3961-2b1b-41c7-8cb9-8436705c2797" xlink:to="loc_srt_MaximumMember_d8a4c21c-1367-4a4c-a94b-3e040bb81478" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateAxis_31ae9850-389f-4a81-87db-f74786d18d9d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_VariableRateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_24f5e177-53bc-4522-a5df-66190e284cfc" xlink:to="loc_us-gaap_VariableRateAxis_31ae9850-389f-4a81-87db-f74786d18d9d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_31ae9850-389f-4a81-87db-f74786d18d9d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_31ae9850-389f-4a81-87db-f74786d18d9d" xlink:to="loc_us-gaap_VariableRateDomain_31ae9850-389f-4a81-87db-f74786d18d9d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_c26d83d2-8a80-49cc-9e2c-ba65b24f6fca" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_31ae9850-389f-4a81-87db-f74786d18d9d" xlink:to="loc_us-gaap_VariableRateDomain_c26d83d2-8a80-49cc-9e2c-ba65b24f6fca" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FederalFundsEffectiveSwapRateMember_548696d6-40c9-4c61-a27a-5ea6d742d243" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FederalFundsEffectiveSwapRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_c26d83d2-8a80-49cc-9e2c-ba65b24f6fca" xlink:to="loc_us-gaap_FederalFundsEffectiveSwapRateMember_548696d6-40c9-4c61-a27a-5ea6d742d243" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember_1076027b-ef9f-443d-a07b-cccfc9090cbf" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_c26d83d2-8a80-49cc-9e2c-ba65b24f6fca" xlink:to="loc_us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember_1076027b-ef9f-443d-a07b-cccfc9090cbf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_DebtInterestRateConditionsAxis_a8347e39-df34-4527-8245-f9cb296d214d" xlink:href="fnf-20231231.xsd#fnf_DebtInterestRateConditionsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_24f5e177-53bc-4522-a5df-66190e284cfc" xlink:to="loc_fnf_DebtInterestRateConditionsAxis_a8347e39-df34-4527-8245-f9cb296d214d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_DebtInterestRateConditionsDomain_a8347e39-df34-4527-8245-f9cb296d214d_default" xlink:href="fnf-20231231.xsd#fnf_DebtInterestRateConditionsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_fnf_DebtInterestRateConditionsAxis_a8347e39-df34-4527-8245-f9cb296d214d" xlink:to="loc_fnf_DebtInterestRateConditionsDomain_a8347e39-df34-4527-8245-f9cb296d214d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_DebtInterestRateConditionsDomain_ab4357d8-f57b-44bd-89d8-1aeef01b4466" xlink:href="fnf-20231231.xsd#fnf_DebtInterestRateConditionsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_fnf_DebtInterestRateConditionsAxis_a8347e39-df34-4527-8245-f9cb296d214d" xlink:to="loc_fnf_DebtInterestRateConditionsDomain_ab4357d8-f57b-44bd-89d8-1aeef01b4466" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_DebtTermsConditionOneMember_e6a98a37-3b82-4cb2-8132-d7fb89b3007f" xlink:href="fnf-20231231.xsd#fnf_DebtTermsConditionOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_DebtInterestRateConditionsDomain_ab4357d8-f57b-44bd-89d8-1aeef01b4466" xlink:to="loc_fnf_DebtTermsConditionOneMember_e6a98a37-3b82-4cb2-8132-d7fb89b3007f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_DebtTermsConditionTwoMember_63389975-465f-4c4e-8219-03437ba109dd" xlink:href="fnf-20231231.xsd#fnf_DebtTermsConditionTwoMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_DebtInterestRateConditionsDomain_ab4357d8-f57b-44bd-89d8-1aeef01b4466" xlink:to="loc_fnf_DebtTermsConditionTwoMember_63389975-465f-4c4e-8219-03437ba109dd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_59da2943-6cf5-43ba-a5f9-68093ca34a7e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_24f5e177-53bc-4522-a5df-66190e284cfc" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_59da2943-6cf5-43ba-a5f9-68093ca34a7e" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_59da2943-6cf5-43ba-a5f9-68093ca34a7e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_59da2943-6cf5-43ba-a5f9-68093ca34a7e" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_59da2943-6cf5-43ba-a5f9-68093ca34a7e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_94d26d05-244c-4a5d-b55e-9ed85aed0eec" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_59da2943-6cf5-43ba-a5f9-68093ca34a7e" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_94d26d05-244c-4a5d-b55e-9ed85aed0eec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_6c50ba37-7e2f-4fb3-b0c7-c43f9dd7e46c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_94d26d05-244c-4a5d-b55e-9ed85aed0eec" xlink:to="loc_us-gaap_SubsequentEventMember_6c50ba37-7e2f-4fb3-b0c7-c43f9dd7e46c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAxis_03a6a2d1-52fd-4221-babd-5ca3755aa37b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_24f5e177-53bc-4522-a5df-66190e284cfc" xlink:to="loc_us-gaap_BusinessAcquisitionAxis_03a6a2d1-52fd-4221-babd-5ca3755aa37b" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_03a6a2d1-52fd-4221-babd-5ca3755aa37b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_03a6a2d1-52fd-4221-babd-5ca3755aa37b" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_03a6a2d1-52fd-4221-babd-5ca3755aa37b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessAcquisitionAcquireeDomain_3fb3be2d-6737-44d6-8632-ed6859812e46" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessAcquisitionAcquireeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_BusinessAcquisitionAxis_03a6a2d1-52fd-4221-babd-5ca3755aa37b" xlink:to="loc_us-gaap_BusinessAcquisitionAcquireeDomain_3fb3be2d-6737-44d6-8632-ed6859812e46" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FGLHoldingsMember_13d14727-db64-41b5-ba96-5f64a1654f13" xlink:href="fnf-20231231.xsd#fnf_FGLHoldingsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_BusinessAcquisitionAcquireeDomain_3fb3be2d-6737-44d6-8632-ed6859812e46" xlink:to="loc_fnf_FGLHoldingsMember_13d14727-db64-41b5-ba96-5f64a1654f13" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_ec928670-7009-4b68-9b90-401bd8d6bf32" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentFaceAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_210a8878-c2b9-4fc9-bbb5-ca46a72c30a0" xlink:to="loc_us-gaap_DebtInstrumentFaceAmount_ec928670-7009-4b68-9b90-401bd8d6bf32" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_99c5fffc-6efb-4ab4-b54e-3686308774b4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_210a8878-c2b9-4fc9-bbb5-ca46a72c30a0" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_99c5fffc-6efb-4ab4-b54e-3686308774b4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFinanceCostsNet_13c2f25b-686b-461a-86c2-cba9dadcaf69" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredFinanceCostsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_210a8878-c2b9-4fc9-bbb5-ca46a72c30a0" xlink:to="loc_us-gaap_DeferredFinanceCostsNet_13c2f25b-686b-461a-86c2-cba9dadcaf69" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_ed436995-ccfa-4936-8e43-8dfdcee2dd1a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_210a8878-c2b9-4fc9-bbb5-ca46a72c30a0" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_ed436995-ccfa-4936-8e43-8dfdcee2dd1a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_DebtInstrumentMaturityDateMaximumPrincipalAmountTrigger_9860495b-5e7a-493a-b230-23e1c98a024d" xlink:href="fnf-20231231.xsd#fnf_DebtInstrumentMaturityDateMaximumPrincipalAmountTrigger"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_210a8878-c2b9-4fc9-bbb5-ca46a72c30a0" xlink:to="loc_fnf_DebtInstrumentMaturityDateMaximumPrincipalAmountTrigger_9860495b-5e7a-493a-b230-23e1c98a024d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_DebtInstrumentPeriodPriorToStatedMaturityDate_538837c5-892b-4988-a8a7-c4465fe132ad" xlink:href="fnf-20231231.xsd#fnf_DebtInstrumentPeriodPriorToStatedMaturityDate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_210a8878-c2b9-4fc9-bbb5-ca46a72c30a0" xlink:to="loc_fnf_DebtInstrumentPeriodPriorToStatedMaturityDate_538837c5-892b-4988-a8a7-c4465fe132ad" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_DebtInstrumentMaturityDateDebtRedeemedAndAnyRefinancingIncurredInConnectionWithPriorDebtMinimumPeriodAfter_6582ebd3-b71c-49c6-9b64-4b93a0bf43d8" xlink:href="fnf-20231231.xsd#fnf_DebtInstrumentMaturityDateDebtRedeemedAndAnyRefinancingIncurredInConnectionWithPriorDebtMinimumPeriodAfter"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_210a8878-c2b9-4fc9-bbb5-ca46a72c30a0" xlink:to="loc_fnf_DebtInstrumentMaturityDateDebtRedeemedAndAnyRefinancingIncurredInConnectionWithPriorDebtMinimumPeriodAfter_6582ebd3-b71c-49c6-9b64-4b93a0bf43d8" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_DebtInstrumentPeriodFromEffectiveDateOrCertainOtherConditionsAreMet_c84adb6f-600f-492a-b8c5-6385f4a0c5ff" xlink:href="fnf-20231231.xsd#fnf_DebtInstrumentPeriodFromEffectiveDateOrCertainOtherConditionsAreMet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_210a8878-c2b9-4fc9-bbb5-ca46a72c30a0" xlink:to="loc_fnf_DebtInstrumentPeriodFromEffectiveDateOrCertainOtherConditionsAreMet_c84adb6f-600f-492a-b8c5-6385f4a0c5ff" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_57f2a7af-8462-4aae-8014-6ed06c3d66a0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_210a8878-c2b9-4fc9-bbb5-ca46a72c30a0" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_57f2a7af-8462-4aae-8014-6ed06c3d66a0" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LinesOfCreditCurrent_f1ebf6c0-f583-4c9c-bf18-adde48c9208e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LinesOfCreditCurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_210a8878-c2b9-4fc9-bbb5-ca46a72c30a0" xlink:to="loc_us-gaap_LinesOfCreditCurrent_f1ebf6c0-f583-4c9c-bf18-adde48c9208e" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtIssuanceCostsLineOfCreditArrangementsNet_465c4ce1-ed31-4f3b-8b09-0f9475fc6932" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtIssuanceCostsLineOfCreditArrangementsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_210a8878-c2b9-4fc9-bbb5-ca46a72c30a0" xlink:to="loc_us-gaap_DebtIssuanceCostsLineOfCreditArrangementsNet_465c4ce1-ed31-4f3b-8b09-0f9475fc6932" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_LineOfCreditFacilityMaximumBorrowingCapacityIncreaseDecrease_d4bdde3a-c6e2-4a8d-9cda-1e9405079b39" xlink:href="fnf-20231231.xsd#fnf_LineOfCreditFacilityMaximumBorrowingCapacityIncreaseDecrease"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_210a8878-c2b9-4fc9-bbb5-ca46a72c30a0" xlink:to="loc_fnf_LineOfCreditFacilityMaximumBorrowingCapacityIncreaseDecrease_d4bdde3a-c6e2-4a8d-9cda-1e9405079b39" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfLinesOfCredit_abe1df1c-e4ee-4c9a-96c2-329554c4f684" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RepaymentsOfLinesOfCredit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_210a8878-c2b9-4fc9-bbb5-ca46a72c30a0" xlink:to="loc_us-gaap_RepaymentsOfLinesOfCredit_abe1df1c-e4ee-4c9a-96c2-329554c4f684" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_dfaf44e3-7061-4556-a30b-a462524bb661" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_210a8878-c2b9-4fc9-bbb5-ca46a72c30a0" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_dfaf44e3-7061-4556-a30b-a462524bb661" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentCarryingAmount_996f2999-46fb-43da-b6ad-32851a687f5d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentCarryingAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_210a8878-c2b9-4fc9-bbb5-ca46a72c30a0" xlink:to="loc_us-gaap_DebtInstrumentCarryingAmount_996f2999-46fb-43da-b6ad-32851a687f5d" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_b41d061f-98ab-4078-8d85-f66ddf08c149" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_210a8878-c2b9-4fc9-bbb5-ca46a72c30a0" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_b41d061f-98ab-4078-8d85-f66ddf08c149" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfLongTermDebt_9582a1eb-682d-400e-b16d-f700461fe1bf" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RepaymentsOfLongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_210a8878-c2b9-4fc9-bbb5-ca46a72c30a0" xlink:to="loc_us-gaap_RepaymentsOfLongTermDebt_9582a1eb-682d-400e-b16d-f700461fe1bf" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_PriceAsPercentOfParOnOfferingOfUnsecuredNotes_e26ae706-f0a0-4df3-b758-57630bc3e3cd" xlink:href="fnf-20231231.xsd#fnf_PriceAsPercentOfParOnOfferingOfUnsecuredNotes"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_210a8878-c2b9-4fc9-bbb5-ca46a72c30a0" xlink:to="loc_fnf_PriceAsPercentOfParOnOfferingOfUnsecuredNotes_e26ae706-f0a0-4df3-b758-57630bc3e3cd" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfSeniorLongTermDebt_774a0c41-a18c-4f62-99f2-7b7abbf76373" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromIssuanceOfSeniorLongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_210a8878-c2b9-4fc9-bbb5-ca46a72c30a0" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfSeniorLongTermDebt_774a0c41-a18c-4f62-99f2-7b7abbf76373" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_88b85715-4208-43d2-9081-cce90061fc33" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentInterestRateEffectivePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_210a8878-c2b9-4fc9-bbb5-ca46a72c30a0" xlink:to="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_88b85715-4208-43d2-9081-cce90061fc33" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ExtinguishmentOfDebtAmount_0be8b945-17c2-461d-8c9c-ecd1bfd9ec86" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ExtinguishmentOfDebtAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_210a8878-c2b9-4fc9-bbb5-ca46a72c30a0" xlink:to="loc_us-gaap_ExtinguishmentOfDebtAmount_0be8b945-17c2-461d-8c9c-ecd1bfd9ec86" xlink:type="arc" order="20"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/CommitmentsandContingenciesNarrativeDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#CommitmentsandContingenciesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/CommitmentsandContingenciesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsLineItems_bdfb0260-b682-4958-a34b-d8f6ef660afd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherCommitmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsTable_09406b8b-98b5-432c-9f4c-0c7c836c77e7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherCommitmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_bdfb0260-b682-4958-a34b-d8f6ef660afd" xlink:to="loc_us-gaap_OtherCommitmentsTable_09406b8b-98b5-432c-9f4c-0c7c836c77e7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseAxis_3f1ce376-3f16-4362-a8d3-a12f4755e173" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_LitigationCaseAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherCommitmentsTable_09406b8b-98b5-432c-9f4c-0c7c836c77e7" xlink:to="loc_srt_LitigationCaseAxis_3f1ce376-3f16-4362-a8d3-a12f4755e173" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseTypeDomain_3f1ce376-3f16-4362-a8d3-a12f4755e173_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_LitigationCaseTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_LitigationCaseAxis_3f1ce376-3f16-4362-a8d3-a12f4755e173" xlink:to="loc_srt_LitigationCaseTypeDomain_3f1ce376-3f16-4362-a8d3-a12f4755e173_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LitigationCaseTypeDomain_6d327085-c035-47d9-86a0-aeb4f389fd7a" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_LitigationCaseTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_LitigationCaseAxis_3f1ce376-3f16-4362-a8d3-a12f4755e173" xlink:to="loc_srt_LitigationCaseTypeDomain_6d327085-c035-47d9-86a0-aeb4f389fd7a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_MatterOfFGLHoldingsMember_284f5908-14c6-40fc-a88c-cf9826c0cb75" xlink:href="fnf-20231231.xsd#fnf_MatterOfFGLHoldingsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_LitigationCaseTypeDomain_6d327085-c035-47d9-86a0-aeb4f389fd7a" xlink:to="loc_fnf_MatterOfFGLHoldingsMember_284f5908-14c6-40fc-a88c-cf9826c0cb75" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_CooperVProgressSoftwareCorpNo123Cv12067Member_990f7c58-3e39-4bfc-b887-de0f93823ab4" xlink:href="fnf-20231231.xsd#fnf_CooperVProgressSoftwareCorpNo123Cv12067Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_LitigationCaseTypeDomain_6d327085-c035-47d9-86a0-aeb4f389fd7a" xlink:to="loc_fnf_CooperVProgressSoftwareCorpNo123Cv12067Member_990f7c58-3e39-4bfc-b887-de0f93823ab4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LitigationStatusAxis_5e324093-a295-4252-bf01-29c5f708d0ec" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LitigationStatusAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherCommitmentsTable_09406b8b-98b5-432c-9f4c-0c7c836c77e7" xlink:to="loc_us-gaap_LitigationStatusAxis_5e324093-a295-4252-bf01-29c5f708d0ec" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LitigationStatusDomain_5e324093-a295-4252-bf01-29c5f708d0ec_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LitigationStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LitigationStatusAxis_5e324093-a295-4252-bf01-29c5f708d0ec" xlink:to="loc_us-gaap_LitigationStatusDomain_5e324093-a295-4252-bf01-29c5f708d0ec_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LitigationStatusDomain_b13a0a60-1f4b-4f61-a7d5-cde4dd0cc060" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LitigationStatusDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LitigationStatusAxis_5e324093-a295-4252-bf01-29c5f708d0ec" xlink:to="loc_us-gaap_LitigationStatusDomain_b13a0a60-1f4b-4f61-a7d5-cde4dd0cc060" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SettledLitigationMember_87b58aed-1ac1-451f-bc87-9faeeb4532fe" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SettledLitigationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LitigationStatusDomain_b13a0a60-1f4b-4f61-a7d5-cde4dd0cc060" xlink:to="loc_us-gaap_SettledLitigationMember_87b58aed-1ac1-451f-bc87-9faeeb4532fe" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PendingLitigationMember_fc0b643b-79b1-43bb-bf38-1d8b25aa8539" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PendingLitigationMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LitigationStatusDomain_b13a0a60-1f4b-4f61-a7d5-cde4dd0cc060" xlink:to="loc_us-gaap_PendingLitigationMember_fc0b643b-79b1-43bb-bf38-1d8b25aa8539" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CededCreditRiskAxis_53bd55f6-5ffb-49bd-adba-1c19d861eca0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CededCreditRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherCommitmentsTable_09406b8b-98b5-432c-9f4c-0c7c836c77e7" xlink:to="loc_us-gaap_CededCreditRiskAxis_53bd55f6-5ffb-49bd-adba-1c19d861eca0" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CededCreditRiskReinsurerDomain_53bd55f6-5ffb-49bd-adba-1c19d861eca0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CededCreditRiskReinsurerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CededCreditRiskAxis_53bd55f6-5ffb-49bd-adba-1c19d861eca0" xlink:to="loc_us-gaap_CededCreditRiskReinsurerDomain_53bd55f6-5ffb-49bd-adba-1c19d861eca0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CededCreditRiskReinsurerDomain_87181c00-116c-4d83-8fea-793cb7355d54" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CededCreditRiskReinsurerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CededCreditRiskAxis_53bd55f6-5ffb-49bd-adba-1c19d861eca0" xlink:to="loc_us-gaap_CededCreditRiskReinsurerDomain_87181c00-116c-4d83-8fea-793cb7355d54" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_KuberaReassuranceCompanyMember_2c45d48a-976b-4db3-96a7-91bb52505c67" xlink:href="fnf-20231231.xsd#fnf_KuberaReassuranceCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CededCreditRiskReinsurerDomain_87181c00-116c-4d83-8fea-793cb7355d54" xlink:to="loc_fnf_KuberaReassuranceCompanyMember_2c45d48a-976b-4db3-96a7-91bb52505c67" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_40dfa6c3-943b-4000-a44a-a7c29952f1a1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LossContingenciesByNatureOfContingencyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherCommitmentsTable_09406b8b-98b5-432c-9f4c-0c7c836c77e7" xlink:to="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_40dfa6c3-943b-4000-a44a-a7c29952f1a1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyNatureDomain_40dfa6c3-943b-4000-a44a-a7c29952f1a1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LossContingencyNatureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_40dfa6c3-943b-4000-a44a-a7c29952f1a1" xlink:to="loc_us-gaap_LossContingencyNatureDomain_40dfa6c3-943b-4000-a44a-a7c29952f1a1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyNatureDomain_c7790b5e-6346-4370-ac77-6f3d111692bc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LossContingencyNatureDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LossContingenciesByNatureOfContingencyAxis_40dfa6c3-943b-4000-a44a-a7c29952f1a1" xlink:to="loc_us-gaap_LossContingencyNatureDomain_c7790b5e-6346-4370-ac77-6f3d111692bc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DamagesFromProductDefectsMember_9cf4cf1a-70eb-4e9e-9b65-111195f0407d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DamagesFromProductDefectsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LossContingencyNatureDomain_c7790b5e-6346-4370-ac77-6f3d111692bc" xlink:to="loc_us-gaap_DamagesFromProductDefectsMember_9cf4cf1a-70eb-4e9e-9b65-111195f0407d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LitigationReserve_b5191e6e-2a83-48d5-9508-ca80c7f08e75" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LitigationReserve"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_bdfb0260-b682-4958-a34b-d8f6ef660afd" xlink:to="loc_us-gaap_LitigationReserve_b5191e6e-2a83-48d5-9508-ca80c7f08e75" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_LossContingencyNumberOfSharesInWhichAssertedStatutoryAppraisalRightsHaveBeenClaimed_483961da-e02a-4e12-b655-d3d8a9264f91" xlink:href="fnf-20231231.xsd#fnf_LossContingencyNumberOfSharesInWhichAssertedStatutoryAppraisalRightsHaveBeenClaimed"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_bdfb0260-b682-4958-a34b-d8f6ef660afd" xlink:to="loc_fnf_LossContingencyNumberOfSharesInWhichAssertedStatutoryAppraisalRightsHaveBeenClaimed_483961da-e02a-4e12-b655-d3d8a9264f91" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LitigationSettlementAmountAwardedFromOtherParty_2938d63c-c66a-4ed0-bdd6-7df9aabfa925" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LitigationSettlementAmountAwardedFromOtherParty"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_bdfb0260-b682-4958-a34b-d8f6ef660afd" xlink:to="loc_us-gaap_LitigationSettlementAmountAwardedFromOtherParty_2938d63c-c66a-4ed0-bdd6-7df9aabfa925" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyPendingClaimsNumber_34b7e87b-2f7a-40c4-8521-07b68b33f451" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LossContingencyPendingClaimsNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_bdfb0260-b682-4958-a34b-d8f6ef660afd" xlink:to="loc_us-gaap_LossContingencyPendingClaimsNumber_34b7e87b-2f7a-40c4-8521-07b68b33f451" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyNumberOfDefendants_8d2238fd-a6db-45c5-b60f-a3e1c978e191" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LossContingencyNumberOfDefendants"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_bdfb0260-b682-4958-a34b-d8f6ef660afd" xlink:to="loc_us-gaap_LossContingencyNumberOfDefendants_8d2238fd-a6db-45c5-b60f-a3e1c978e191" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_LossContingencyPendingClaimsOtherEntitiesNumber_996517a1-8b17-4775-bb84-e114f6cfc6ea" xlink:href="fnf-20231231.xsd#fnf_LossContingencyPendingClaimsOtherEntitiesNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_bdfb0260-b682-4958-a34b-d8f6ef660afd" xlink:to="loc_fnf_LossContingencyPendingClaimsOtherEntitiesNumber_996517a1-8b17-4775-bb84-e114f6cfc6ea" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EscrowDeposit_67bce63c-08c5-4a85-bbc8-82e08d137830" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EscrowDeposit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_bdfb0260-b682-4958-a34b-d8f6ef660afd" xlink:to="loc_us-gaap_EscrowDeposit_67bce63c-08c5-4a85-bbc8-82e08d137830" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_DebtInstrumentAccordionFeatureIncreaseLimit_a307fa1b-ec13-4ea4-b1c7-ce114977e548" xlink:href="fnf-20231231.xsd#fnf_DebtInstrumentAccordionFeatureIncreaseLimit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_bdfb0260-b682-4958-a34b-d8f6ef660afd" xlink:to="loc_fnf_DebtInstrumentAccordionFeatureIncreaseLimit_a307fa1b-ec13-4ea4-b1c7-ce114977e548" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/CommitmentsandContingenciesScheduleofUnfundedCommitmentsbyInvestedAssetClassDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#CommitmentsandContingenciesScheduleofUnfundedCommitmentsbyInvestedAssetClassDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/CommitmentsandContingenciesScheduleofUnfundedCommitmentsbyInvestedAssetClassDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsLineItems_6c9ea6f7-3fa0-40a2-9f3d-670269d036cd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherCommitmentsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsTable_454479f7-3c03-4b30-9133-421e75e93cfd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherCommitmentsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_6c9ea6f7-3fa0-40a2-9f3d-670269d036cd" xlink:to="loc_us-gaap_OtherCommitmentsTable_454479f7-3c03-4b30-9133-421e75e93cfd" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsAxis_bc23700c-c314-4726-9d64-3e59736cad08" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherCommitmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_OtherCommitmentsTable_454479f7-3c03-4b30-9133-421e75e93cfd" xlink:to="loc_us-gaap_OtherCommitmentsAxis_bc23700c-c314-4726-9d64-3e59736cad08" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsDomain_bc23700c-c314-4726-9d64-3e59736cad08_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherCommitmentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_OtherCommitmentsAxis_bc23700c-c314-4726-9d64-3e59736cad08" xlink:to="loc_us-gaap_OtherCommitmentsDomain_bc23700c-c314-4726-9d64-3e59736cad08_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitmentsDomain_3deb4630-6b1f-4a85-b57b-dfe919ddb371" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherCommitmentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_OtherCommitmentsAxis_bc23700c-c314-4726-9d64-3e59736cad08" xlink:to="loc_us-gaap_OtherCommitmentsDomain_3deb4630-6b1f-4a85-b57b-dfe919ddb371" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestmentsMember_2952b082-d960-482a-850b-4de7a635874b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityMethodInvestmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsDomain_3deb4630-6b1f-4a85-b57b-dfe919ddb371" xlink:to="loc_us-gaap_EquityMethodInvestmentsMember_2952b082-d960-482a-850b-4de7a635874b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_WholeLoansMember_94630fc1-d932-4876-8afa-66e10fe83775" xlink:href="fnf-20231231.xsd#fnf_WholeLoansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsDomain_3deb4630-6b1f-4a85-b57b-dfe919ddb371" xlink:to="loc_fnf_WholeLoansMember_94630fc1-d932-4876-8afa-66e10fe83775" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FixedMaturitySecuritiesAssetBackedSecuritiesMember_66ca1c5e-0a4e-4eae-b8cf-e0a7a88fb9f4" xlink:href="fnf-20231231.xsd#fnf_FixedMaturitySecuritiesAssetBackedSecuritiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsDomain_3deb4630-6b1f-4a85-b57b-dfe919ddb371" xlink:to="loc_fnf_FixedMaturitySecuritiesAssetBackedSecuritiesMember_66ca1c5e-0a4e-4eae-b8cf-e0a7a88fb9f4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_DirectLendingMember_aa6a2016-fe59-40f8-9053-2ed7baf7b0b1" xlink:href="fnf-20231231.xsd#fnf_DirectLendingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsDomain_3deb4630-6b1f-4a85-b57b-dfe919ddb371" xlink:to="loc_fnf_DirectLendingMember_aa6a2016-fe59-40f8-9053-2ed7baf7b0b1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FixedMaturitiesAvailableForSaleMember_4e3924fb-c42b-41ae-91ce-4ff4146c57ed" xlink:href="fnf-20231231.xsd#fnf_FixedMaturitiesAvailableForSaleMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsDomain_3deb4630-6b1f-4a85-b57b-dfe919ddb371" xlink:to="loc_fnf_FixedMaturitiesAvailableForSaleMember_4e3924fb-c42b-41ae-91ce-4ff4146c57ed" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_OtherAssetCommitmentsMember_8f83bad1-e19a-4be7-afb3-98edc00eb3de" xlink:href="fnf-20231231.xsd#fnf_OtherAssetCommitmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsDomain_3deb4630-6b1f-4a85-b57b-dfe919ddb371" xlink:to="loc_fnf_OtherAssetCommitmentsMember_8f83bad1-e19a-4be7-afb3-98edc00eb3de" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_CommercialMortgageLoansMember_f07b43ed-84cf-4ab8-87e0-cbb0c5e22b46" xlink:href="fnf-20231231.xsd#fnf_CommercialMortgageLoansMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsDomain_3deb4630-6b1f-4a85-b57b-dfe919ddb371" xlink:to="loc_fnf_CommercialMortgageLoansMember_f07b43ed-84cf-4ab8-87e0-cbb0c5e22b46" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_OtherInvestedAssetsMember_995c6c9d-3409-4cfb-9bc0-357272cc97e5" xlink:href="fnf-20231231.xsd#fnf_OtherInvestedAssetsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsDomain_3deb4630-6b1f-4a85-b57b-dfe919ddb371" xlink:to="loc_fnf_OtherInvestedAssetsMember_995c6c9d-3409-4cfb-9bc0-357272cc97e5" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_CommitmentsIncludedInLiabilitiesMember_8946c111-4701-44c5-b9ef-9ca253b516d9" xlink:href="fnf-20231231.xsd#fnf_CommitmentsIncludedInLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsDomain_3deb4630-6b1f-4a85-b57b-dfe919ddb371" xlink:to="loc_fnf_CommitmentsIncludedInLiabilitiesMember_8946c111-4701-44c5-b9ef-9ca253b516d9" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_CommitmenttoInvestMember_7fa95656-21d0-44a9-b972-17bf763f449b" xlink:href="fnf-20231231.xsd#fnf_CommitmenttoInvestMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsDomain_3deb4630-6b1f-4a85-b57b-dfe919ddb371" xlink:to="loc_fnf_CommitmenttoInvestMember_7fa95656-21d0-44a9-b972-17bf763f449b" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCommitment_f5af745e-803d-4192-a964-828fbe884983" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherCommitment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_OtherCommitmentsLineItems_6c9ea6f7-3fa0-40a2-9f3d-670269d036cd" xlink:to="loc_us-gaap_OtherCommitment_f5af745e-803d-4192-a964-828fbe884983" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/DividendsDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#DividendsDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/DividendsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventLineItems_d2297538-9b39-4233-8bb2-ccdfcb4ef787" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SubsequentEventLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTable_9b159f89-8ad4-4f3c-8e41-bad2fa309243" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SubsequentEventTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SubsequentEventLineItems_d2297538-9b39-4233-8bb2-ccdfcb4ef787" xlink:to="loc_us-gaap_SubsequentEventTable_9b159f89-8ad4-4f3c-8e41-bad2fa309243" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_869e3a5d-8992-4132-a98f-52bc15315f7d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_SubsequentEventTable_9b159f89-8ad4-4f3c-8e41-bad2fa309243" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_869e3a5d-8992-4132-a98f-52bc15315f7d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_869e3a5d-8992-4132-a98f-52bc15315f7d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_869e3a5d-8992-4132-a98f-52bc15315f7d" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_869e3a5d-8992-4132-a98f-52bc15315f7d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_5f25c636-9f0a-4ac3-9d42-68d3c4b157f2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_869e3a5d-8992-4132-a98f-52bc15315f7d" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_5f25c636-9f0a-4ac3-9d42-68d3c4b157f2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_7da9c439-f7ef-4196-bba9-e4adff990313" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_5f25c636-9f0a-4ac3-9d42-68d3c4b157f2" xlink:to="loc_us-gaap_SubsequentEventMember_7da9c439-f7ef-4196-bba9-e4adff990313" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockDividendsPerShareDeclared_c38c22f2-b5ea-4dd7-b431-51e2b744bc87" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommonStockDividendsPerShareDeclared"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventLineItems_d2297538-9b39-4233-8bb2-ccdfcb4ef787" xlink:to="loc_us-gaap_CommonStockDividendsPerShareDeclared_c38c22f2-b5ea-4dd7-b431-51e2b744bc87" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/SegmentInformationScheduleofSegmentReportingInformationDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#SegmentInformationScheduleofSegmentReportingInformationDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/SegmentInformationScheduleofSegmentReportingInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentReportingInformationLineItems_fe172178-6794-4f62-92e4-238530396db8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentReportingInformationLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_d4926cdf-aa92-4c54-a755-20e31967e61b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_fe172178-6794-4f62-92e4-238530396db8" xlink:to="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_d4926cdf-aa92-4c54-a755-20e31967e61b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_fdeca289-b83f-4ab6-814e-ace0e278b0d2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_d4926cdf-aa92-4c54-a755-20e31967e61b" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_fdeca289-b83f-4ab6-814e-ace0e278b0d2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_fdeca289-b83f-4ab6-814e-ace0e278b0d2_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_fdeca289-b83f-4ab6-814e-ace0e278b0d2" xlink:to="loc_us-gaap_SegmentDomain_fdeca289-b83f-4ab6-814e-ace0e278b0d2_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_00a9650d-66a7-4f12-a6bb-3f40b10316f8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_fdeca289-b83f-4ab6-814e-ace0e278b0d2" xlink:to="loc_us-gaap_SegmentDomain_00a9650d-66a7-4f12-a6bb-3f40b10316f8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_TitleSegmentMember_d7e5e1a5-e3ae-48b4-b92e-cdf8c01c81b3" xlink:href="fnf-20231231.xsd#fnf_TitleSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_00a9650d-66a7-4f12-a6bb-3f40b10316f8" xlink:to="loc_fnf_TitleSegmentMember_d7e5e1a5-e3ae-48b4-b92e-cdf8c01c81b3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FGSegmentMember_762af557-4af4-48c8-bdb4-d0cf322e0c7e" xlink:href="fnf-20231231.xsd#fnf_FGSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_00a9650d-66a7-4f12-a6bb-3f40b10316f8" xlink:to="loc_fnf_FGSegmentMember_762af557-4af4-48c8-bdb4-d0cf322e0c7e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CorporateAndOtherMember_3bafe168-7905-49df-aca1-c93a418db126" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CorporateAndOtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_00a9650d-66a7-4f12-a6bb-3f40b10316f8" xlink:to="loc_us-gaap_CorporateAndOtherMember_3bafe168-7905-49df-aca1-c93a418db126" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_344cdb05-a7d2-4781-9643-f4c036c42167" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfSegmentReportingInformationBySegmentTable_d4926cdf-aa92-4c54-a755-20e31967e61b" xlink:to="loc_srt_ConsolidationItemsAxis_344cdb05-a7d2-4781-9643-f4c036c42167" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_344cdb05-a7d2-4781-9643-f4c036c42167_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_344cdb05-a7d2-4781-9643-f4c036c42167" xlink:to="loc_srt_ConsolidationItemsDomain_344cdb05-a7d2-4781-9643-f4c036c42167_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_e8d1f9c4-8093-4149-b312-cec5c1d9022d" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_344cdb05-a7d2-4781-9643-f4c036c42167" xlink:to="loc_srt_ConsolidationItemsDomain_e8d1f9c4-8093-4149-b312-cec5c1d9022d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_b329cd5d-382e-4084-9d05-78f95d6e4bad" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_e8d1f9c4-8093-4149-b312-cec5c1d9022d" xlink:to="loc_us-gaap_OperatingSegmentsMember_b329cd5d-382e-4084-9d05-78f95d6e4bad" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PremiumsWrittenNet_11bb6b99-d1cd-4a5d-954c-cc759465e59a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PremiumsWrittenNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_fe172178-6794-4f62-92e4-238530396db8" xlink:to="loc_us-gaap_PremiumsWrittenNet_11bb6b99-d1cd-4a5d-954c-cc759465e59a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InsuranceCommissionsAndFees_be521640-000e-4539-b612-6fd60c4f6e83" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InsuranceCommissionsAndFees"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_fe172178-6794-4f62-92e4-238530396db8" xlink:to="loc_us-gaap_InsuranceCommissionsAndFees_be521640-000e-4539-b612-6fd60c4f6e83" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InsuranceServicesRevenue_47b8112a-b8e2-4138-a682-b3b1acec98ba" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InsuranceServicesRevenue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_fe172178-6794-4f62-92e4-238530396db8" xlink:to="loc_us-gaap_InsuranceServicesRevenue_47b8112a-b8e2-4138-a682-b3b1acec98ba" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_NetInvestmentIncomeAndGainLossOnInvestments_348731c8-393f-4d2b-861b-b5c5deb02e10" xlink:href="fnf-20231231.xsd#fnf_NetInvestmentIncomeAndGainLossOnInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_fe172178-6794-4f62-92e4-238530396db8" xlink:to="loc_fnf_NetInvestmentIncomeAndGainLossOnInvestments_348731c8-393f-4d2b-861b-b5c5deb02e10" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_81626c0e-1b5f-417a-956a-27501e160c6b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_fe172178-6794-4f62-92e4-238530396db8" xlink:to="loc_us-gaap_Revenues_81626c0e-1b5f-417a-956a-27501e160c6b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationAndAmortization_3504e6ee-7654-4585-b55f-1a15e315d0c3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DepreciationAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_fe172178-6794-4f62-92e4-238530396db8" xlink:to="loc_us-gaap_DepreciationAndAmortization_3504e6ee-7654-4585-b55f-1a15e315d0c3" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpense_1b3aa9d3-138e-4cc5-ae2b-a9e1c37c1c4f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InterestExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_fe172178-6794-4f62-92e4-238530396db8" xlink:to="loc_us-gaap_InterestExpense_1b3aa9d3-138e-4cc5-ae2b-a9e1c37c1c4f" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_e6ea6f54-c310-434b-9517-97a727319e2a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_fe172178-6794-4f62-92e4-238530396db8" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_e6ea6f54-c310-434b-9517-97a727319e2a" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_7e80774b-984b-4055-85bd-3b3fcebc8845" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_fe172178-6794-4f62-92e4-238530396db8" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_7e80774b-984b-4055-85bd-3b3fcebc8845" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_IncomeLossFromContinuingOperationsBeforeMinorityInterestAndIncomeLossOnEquityMethodInvestmentsNetOfIncomeTax_02620dc4-8077-4b4a-89ba-f896c759f314" xlink:href="fnf-20231231.xsd#fnf_IncomeLossFromContinuingOperationsBeforeMinorityInterestAndIncomeLossOnEquityMethodInvestmentsNetOfIncomeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_fe172178-6794-4f62-92e4-238530396db8" xlink:to="loc_fnf_IncomeLossFromContinuingOperationsBeforeMinorityInterestAndIncomeLossOnEquityMethodInvestmentsNetOfIncomeTax_02620dc4-8077-4b4a-89ba-f896c759f314" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_e4dab2f8-93c8-4fe7-b36b-b504a32340a8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeLossFromEquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_fe172178-6794-4f62-92e4-238530396db8" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestments_e4dab2f8-93c8-4fe7-b36b-b504a32340a8" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_fcd545da-629c-41fc-a370-798490c66f0e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_fe172178-6794-4f62-92e4-238530396db8" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_fcd545da-629c-41fc-a370-798490c66f0e" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_d0e944ec-fda9-4d11-add8-2450afb509ee" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_fe172178-6794-4f62-92e4-238530396db8" xlink:to="loc_us-gaap_Assets_d0e944ec-fda9-4d11-add8-2450afb509ee" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_90a18594-99b1-4ab5-a2bd-b4dfd2d1a9ec" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentReportingInformationLineItems_fe172178-6794-4f62-92e4-238530396db8" xlink:to="loc_us-gaap_Goodwill_90a18594-99b1-4ab5-a2bd-b4dfd2d1a9ec" xlink:type="arc" order="13"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/SupplementalCashFlowInformationAdditionalDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#SupplementalCashFlowInformationAdditionalDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/SupplementalCashFlowInformationAdditionalDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsPayableLineItems_63285877-a269-4014-abe2-68de28a1efb1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DividendsPayableLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsPayableTable_7927239a-50dc-4dbc-90b7-a09d5e927ec2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DividendsPayableTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DividendsPayableLineItems_63285877-a269-4014-abe2-68de28a1efb1" xlink:to="loc_us-gaap_DividendsPayableTable_7927239a-50dc-4dbc-90b7-a09d5e927ec2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipAxis_4cd57934-0adb-4819-a1b0-5fa5c0d4595c" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_OwnershipAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DividendsPayableTable_7927239a-50dc-4dbc-90b7-a09d5e927ec2" xlink:to="loc_srt_OwnershipAxis_4cd57934-0adb-4819-a1b0-5fa5c0d4595c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_4cd57934-0adb-4819-a1b0-5fa5c0d4595c_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_OwnershipAxis_4cd57934-0adb-4819-a1b0-5fa5c0d4595c" xlink:to="loc_srt_OwnershipDomain_4cd57934-0adb-4819-a1b0-5fa5c0d4595c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_OwnershipDomain_9e78edad-09ee-4dc6-aac9-401c21227abd" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_OwnershipDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_OwnershipAxis_4cd57934-0adb-4819-a1b0-5fa5c0d4595c" xlink:to="loc_srt_OwnershipDomain_9e78edad-09ee-4dc6-aac9-401c21227abd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FGMember_4ef17824-2c12-4b7e-a9a0-1e6684ef4f32" xlink:href="fnf-20231231.xsd#fnf_FGMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_OwnershipDomain_9e78edad-09ee-4dc6-aac9-401c21227abd" xlink:to="loc_fnf_FGMember_4ef17824-2c12-4b7e-a9a0-1e6684ef4f32" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_11292ba5-2eae-4ae8-b1ff-98b8f84c3841" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DividendsPayableTable_7927239a-50dc-4dbc-90b7-a09d5e927ec2" xlink:to="loc_dei_LegalEntityAxis_11292ba5-2eae-4ae8-b1ff-98b8f84c3841" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_11292ba5-2eae-4ae8-b1ff-98b8f84c3841_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_11292ba5-2eae-4ae8-b1ff-98b8f84c3841" xlink:to="loc_dei_EntityDomain_11292ba5-2eae-4ae8-b1ff-98b8f84c3841_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_e9b3cdfd-c57b-4240-aa04-25503e94b5d0" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_11292ba5-2eae-4ae8-b1ff-98b8f84c3841" xlink:to="loc_dei_EntityDomain_e9b3cdfd-c57b-4240-aa04-25503e94b5d0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FidelityNationalFinancialIncMember_6ca9f169-2dbd-4ebe-b0a7-8e8ae47ac8c2" xlink:href="fnf-20231231.xsd#fnf_FidelityNationalFinancialIncMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_e9b3cdfd-c57b-4240-aa04-25503e94b5d0" xlink:to="loc_fnf_FidelityNationalFinancialIncMember_6ca9f169-2dbd-4ebe-b0a7-8e8ae47ac8c2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_DividendToShareholdersProRataPercentageOfCommonStock_44a971c2-dd35-4900-897f-b1ce0231eb57" xlink:href="fnf-20231231.xsd#fnf_DividendToShareholdersProRataPercentageOfCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DividendsPayableLineItems_63285877-a269-4014-abe2-68de28a1efb1" xlink:to="loc_fnf_DividendToShareholdersProRataPercentageOfCommonStock_44a971c2-dd35-4900-897f-b1ce0231eb57" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/RevenueRecognitionDisaggregationofRevenueDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#RevenueRecognitionDisaggregationofRevenueDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/RevenueRecognitionDisaggregationofRevenueDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_22ed029d-81b1-4527-bd89-ee7c64f6e508" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_7df38996-0aa7-4107-bc42-6cbea2033914" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_22ed029d-81b1-4527-bd89-ee7c64f6e508" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_7df38996-0aa7-4107-bc42-6cbea2033914" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_68f8ae94-a683-4fba-8df1-67a3ae0b1817" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_7df38996-0aa7-4107-bc42-6cbea2033914" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_68f8ae94-a683-4fba-8df1-67a3ae0b1817" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_68f8ae94-a683-4fba-8df1-67a3ae0b1817_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_68f8ae94-a683-4fba-8df1-67a3ae0b1817" xlink:to="loc_us-gaap_SegmentDomain_68f8ae94-a683-4fba-8df1-67a3ae0b1817_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_ec632109-8d6d-4146-8602-7ed7073610bd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_68f8ae94-a683-4fba-8df1-67a3ae0b1817" xlink:to="loc_us-gaap_SegmentDomain_ec632109-8d6d-4146-8602-7ed7073610bd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_TitleSegmentMember_24c907e7-dd87-4e1e-b7f6-f7225ecf059f" xlink:href="fnf-20231231.xsd#fnf_TitleSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_ec632109-8d6d-4146-8602-7ed7073610bd" xlink:to="loc_fnf_TitleSegmentMember_24c907e7-dd87-4e1e-b7f6-f7225ecf059f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FGSegmentMember_cbaac84e-7901-43d1-af23-4d6a59ccaedb" xlink:href="fnf-20231231.xsd#fnf_FGSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_ec632109-8d6d-4146-8602-7ed7073610bd" xlink:to="loc_fnf_FGSegmentMember_cbaac84e-7901-43d1-af23-4d6a59ccaedb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_CorporateAndReconcilingItemsMember_d5686be0-16e8-4b8c-9216-365bc17e1304" xlink:href="fnf-20231231.xsd#fnf_CorporateAndReconcilingItemsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_ec632109-8d6d-4146-8602-7ed7073610bd" xlink:to="loc_fnf_CorporateAndReconcilingItemsMember_d5686be0-16e8-4b8c-9216-365bc17e1304" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_55ce2dc0-2f23-4160-88f6-f1e3ff3e91f4" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_7df38996-0aa7-4107-bc42-6cbea2033914" xlink:to="loc_srt_ProductOrServiceAxis_55ce2dc0-2f23-4160-88f6-f1e3ff3e91f4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_55ce2dc0-2f23-4160-88f6-f1e3ff3e91f4_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_55ce2dc0-2f23-4160-88f6-f1e3ff3e91f4" xlink:to="loc_srt_ProductsAndServicesDomain_55ce2dc0-2f23-4160-88f6-f1e3ff3e91f4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_656db060-6111-4c82-bc83-51a7698ad8ad" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_55ce2dc0-2f23-4160-88f6-f1e3ff3e91f4" xlink:to="loc_srt_ProductsAndServicesDomain_656db060-6111-4c82-bc83-51a7698ad8ad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_InsuranceContractsDirectTitleInsurancePremiumsMember_0ca91cfe-1c0f-44f9-9326-af4f33580f92" xlink:href="fnf-20231231.xsd#fnf_InsuranceContractsDirectTitleInsurancePremiumsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_656db060-6111-4c82-bc83-51a7698ad8ad" xlink:to="loc_fnf_InsuranceContractsDirectTitleInsurancePremiumsMember_0ca91cfe-1c0f-44f9-9326-af4f33580f92" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_InsuranceContractsAgencyTitleInsurancePremiumsMember_87c7fc63-09e9-4425-b97b-3f16b1d632a6" xlink:href="fnf-20231231.xsd#fnf_InsuranceContractsAgencyTitleInsurancePremiumsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_656db060-6111-4c82-bc83-51a7698ad8ad" xlink:to="loc_fnf_InsuranceContractsAgencyTitleInsurancePremiumsMember_87c7fc63-09e9-4425-b97b-3f16b1d632a6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_LifeInsurancePremiumsInsuranceAndInvestmentProductFeesOtherMember_573b603b-6105-48bb-be72-e3bbcc36b6b1" xlink:href="fnf-20231231.xsd#fnf_LifeInsurancePremiumsInsuranceAndInvestmentProductFeesOtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_656db060-6111-4c82-bc83-51a7698ad8ad" xlink:to="loc_fnf_LifeInsurancePremiumsInsuranceAndInvestmentProductFeesOtherMember_573b603b-6105-48bb-be72-e3bbcc36b6b1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_InsuranceContractsHomeWarrantyMember_2e4dac1d-6c05-478c-a2a7-5eedf22cff52" xlink:href="fnf-20231231.xsd#fnf_InsuranceContractsHomeWarrantyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_656db060-6111-4c82-bc83-51a7698ad8ad" xlink:to="loc_fnf_InsuranceContractsHomeWarrantyMember_2e4dac1d-6c05-478c-a2a7-5eedf22cff52" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_InsuranceContractsMember_d12eb6c7-5f0e-48fa-8014-37f9263ff240" xlink:href="fnf-20231231.xsd#fnf_InsuranceContractsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_656db060-6111-4c82-bc83-51a7698ad8ad" xlink:to="loc_fnf_InsuranceContractsMember_d12eb6c7-5f0e-48fa-8014-37f9263ff240" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_EscrowFeesMember_aac6a525-642c-48fc-9a5a-97a76d25793f" xlink:href="fnf-20231231.xsd#fnf_EscrowFeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_656db060-6111-4c82-bc83-51a7698ad8ad" xlink:to="loc_fnf_EscrowFeesMember_aac6a525-642c-48fc-9a5a-97a76d25793f" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_OtherTitleRelatedFeesAndIncomeMember_7560d071-8c6f-425b-91d4-4c2d5b3d9e51" xlink:href="fnf-20231231.xsd#fnf_OtherTitleRelatedFeesAndIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_656db060-6111-4c82-bc83-51a7698ad8ad" xlink:to="loc_fnf_OtherTitleRelatedFeesAndIncomeMember_7560d071-8c6f-425b-91d4-4c2d5b3d9e51" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_ServiceLinkExcludingTitlePremiumsEscrowFeesAndSubservicingFeesMember_48e43ca4-1528-4c04-b103-8bdca129ebad" xlink:href="fnf-20231231.xsd#fnf_ServiceLinkExcludingTitlePremiumsEscrowFeesAndSubservicingFeesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_656db060-6111-4c82-bc83-51a7698ad8ad" xlink:to="loc_fnf_ServiceLinkExcludingTitlePremiumsEscrowFeesAndSubservicingFeesMember_48e43ca4-1528-4c04-b103-8bdca129ebad" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_RealEstateTechnologyMember_b64424d5-f8e9-4dab-ac42-501f2de506a7" xlink:href="fnf-20231231.xsd#fnf_RealEstateTechnologyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_656db060-6111-4c82-bc83-51a7698ad8ad" xlink:to="loc_fnf_RealEstateTechnologyMember_b64424d5-f8e9-4dab-ac42-501f2de506a7" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_OtherProductsAndServicesMember_76841b38-95a0-474e-99ae-7dfdddd2efde" xlink:href="fnf-20231231.xsd#fnf_OtherProductsAndServicesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_656db060-6111-4c82-bc83-51a7698ad8ad" xlink:to="loc_fnf_OtherProductsAndServicesMember_76841b38-95a0-474e-99ae-7dfdddd2efde" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_LifeInsurancePremiumsInsuranceAndInvestmentProductFeesOtherPensionRiskTransferMember_9a677132-5f55-4177-8091-5dbd733e3258" xlink:href="fnf-20231231.xsd#fnf_LifeInsurancePremiumsInsuranceAndInvestmentProductFeesOtherPensionRiskTransferMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_656db060-6111-4c82-bc83-51a7698ad8ad" xlink:to="loc_fnf_LifeInsurancePremiumsInsuranceAndInvestmentProductFeesOtherPensionRiskTransferMember_9a677132-5f55-4177-8091-5dbd733e3258" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_d80df4be-ddab-4c49-9fd3-e46235867784" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_22ed029d-81b1-4527-bd89-ee7c64f6e508" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_d80df4be-ddab-4c49-9fd3-e46235867784" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FeesAndCommissionsMortgageBankingAndServicing_17a17a43-c191-4931-a5db-439a74f0f8fa" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FeesAndCommissionsMortgageBankingAndServicing"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_22ed029d-81b1-4527-bd89-ee7c64f6e508" xlink:to="loc_us-gaap_FeesAndCommissionsMortgageBankingAndServicing_17a17a43-c191-4931-a5db-439a74f0f8fa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherIncome_4f2e78a6-6ec8-4f27-a3f7-8e04e7a698d4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_22ed029d-81b1-4527-bd89-ee7c64f6e508" xlink:to="loc_us-gaap_OtherIncome_4f2e78a6-6ec8-4f27-a3f7-8e04e7a698d4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetInvestmentIncome_86c155bc-812f-4a57-85bb-c277345e9a12" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetInvestmentIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_22ed029d-81b1-4527-bd89-ee7c64f6e508" xlink:to="loc_us-gaap_NetInvestmentIncome_86c155bc-812f-4a57-85bb-c277345e9a12" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnInvestments_e154d785-df13-4bfb-a925-257e95a7ce2f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GainLossOnInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_22ed029d-81b1-4527-bd89-ee7c64f6e508" xlink:to="loc_us-gaap_GainLossOnInvestments_e154d785-df13-4bfb-a925-257e95a7ce2f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_b60967f1-3c25-48a7-add8-2860822cc64f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_22ed029d-81b1-4527-bd89-ee7c64f6e508" xlink:to="loc_us-gaap_Revenues_b60967f1-3c25-48a7-add8-2860822cc64f" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/RevenueRecognitionPremiumandAnnuityDepositsDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#RevenueRecognitionPremiumandAnnuityDepositsDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/RevenueRecognitionPremiumandAnnuityDepositsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_988cb4c8-f7f9-47bb-b8aa-9902d8b4c860" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_90d83ad4-2bda-4488-9ea7-150200f34ad2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_988cb4c8-f7f9-47bb-b8aa-9902d8b4c860" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_90d83ad4-2bda-4488-9ea7-150200f34ad2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_c7393e67-0794-4daf-bdb3-52b87cb0057f" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_90d83ad4-2bda-4488-9ea7-150200f34ad2" xlink:to="loc_srt_ProductOrServiceAxis_c7393e67-0794-4daf-bdb3-52b87cb0057f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_c7393e67-0794-4daf-bdb3-52b87cb0057f_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_c7393e67-0794-4daf-bdb3-52b87cb0057f" xlink:to="loc_srt_ProductsAndServicesDomain_c7393e67-0794-4daf-bdb3-52b87cb0057f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_4603f9ec-9137-4ab6-9cb5-5b3c99f0aa21" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_c7393e67-0794-4daf-bdb3-52b87cb0057f" xlink:to="loc_srt_ProductsAndServicesDomain_4603f9ec-9137-4ab6-9cb5-5b3c99f0aa21" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FixedAnnuityMember_1efabedb-9644-4e54-8fb7-bff79bdedece" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FixedAnnuityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_4603f9ec-9137-4ab6-9cb5-5b3c99f0aa21" xlink:to="loc_us-gaap_FixedAnnuityMember_1efabedb-9644-4e54-8fb7-bff79bdedece" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FixedRateAnnuityMember_2d4bc959-4a60-42fa-ac74-159d8f33a26c" xlink:href="fnf-20231231.xsd#fnf_FixedRateAnnuityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_4603f9ec-9137-4ab6-9cb5-5b3c99f0aa21" xlink:to="loc_fnf_FixedRateAnnuityMember_2d4bc959-4a60-42fa-ac74-159d8f33a26c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FundingAgreementBackedNotesMember_d3fabcc9-239b-4a0f-baba-ef075370d699" xlink:href="fnf-20231231.xsd#fnf_FundingAgreementBackedNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_4603f9ec-9137-4ab6-9cb5-5b3c99f0aa21" xlink:to="loc_fnf_FundingAgreementBackedNotesMember_d3fabcc9-239b-4a0f-baba-ef075370d699" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_LifeInsuranceMember_cc190abf-4421-42a1-8404-483594629c5c" xlink:href="fnf-20231231.xsd#fnf_LifeInsuranceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_4603f9ec-9137-4ab6-9cb5-5b3c99f0aa21" xlink:to="loc_fnf_LifeInsuranceMember_cc190abf-4421-42a1-8404-483594629c5c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_8353f3f9-e03c-475c-ad34-b49a893eb246" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_90d83ad4-2bda-4488-9ea7-150200f34ad2" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_8353f3f9-e03c-475c-ad34-b49a893eb246" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_8353f3f9-e03c-475c-ad34-b49a893eb246_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_8353f3f9-e03c-475c-ad34-b49a893eb246" xlink:to="loc_us-gaap_SegmentDomain_8353f3f9-e03c-475c-ad34-b49a893eb246_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_c7af5cb3-7352-47a1-8b75-ba99a89f9da7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_8353f3f9-e03c-475c-ad34-b49a893eb246" xlink:to="loc_us-gaap_SegmentDomain_c7af5cb3-7352-47a1-8b75-ba99a89f9da7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FGSegmentMember_afc67b83-897f-4cc4-a686-bc3aa229fe5f" xlink:href="fnf-20231231.xsd#fnf_FGSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_c7af5cb3-7352-47a1-8b75-ba99a89f9da7" xlink:to="loc_fnf_FGSegmentMember_afc67b83-897f-4cc4-a686-bc3aa229fe5f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_PremiumAndAnnuityDepositsNetOfReinsurance_ffa44d9e-00dc-41b0-82e3-3e0b7fbecd96" xlink:href="fnf-20231231.xsd#fnf_PremiumAndAnnuityDepositsNetOfReinsurance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_988cb4c8-f7f9-47bb-b8aa-9902d8b4c860" xlink:to="loc_fnf_PremiumAndAnnuityDepositsNetOfReinsurance_ffa44d9e-00dc-41b0-82e3-3e0b7fbecd96" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/RevenueRecognitionContractBalancesInformationaboutReceivablesandDeferredRevenueDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#RevenueRecognitionContractBalancesInformationaboutReceivablesandDeferredRevenueDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/RevenueRecognitionContractBalancesInformationaboutReceivablesandDeferredRevenueDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_bedc98cc-8451-4069-a515-bdb62a264cc2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_be2c37d8-23dc-44b9-8726-6cc0bfcc80b7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_bedc98cc-8451-4069-a515-bdb62a264cc2" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_be2c37d8-23dc-44b9-8726-6cc0bfcc80b7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByLiabilityClassAxis_6917cfae-fcee-40fe-8b50-f0719a91bf46" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueByLiabilityClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_be2c37d8-23dc-44b9-8726-6cc0bfcc80b7" xlink:to="loc_us-gaap_FairValueByLiabilityClassAxis_6917cfae-fcee-40fe-8b50-f0719a91bf46" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_6917cfae-fcee-40fe-8b50-f0719a91bf46_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_6917cfae-fcee-40fe-8b50-f0719a91bf46" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_6917cfae-fcee-40fe-8b50-f0719a91bf46_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_83dfd41e-651f-4739-be95-5ec771128f7c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_6917cfae-fcee-40fe-8b50-f0719a91bf46" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_83dfd41e-651f-4739-be95-5ec771128f7c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_DeferredRevenueMember_1898d953-573e-4615-b685-c6d3b555b2cd" xlink:href="fnf-20231231.xsd#fnf_DeferredRevenueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_83dfd41e-651f-4739-be95-5ec771128f7c" xlink:to="loc_fnf_DeferredRevenueMember_1898d953-573e-4615-b685-c6d3b555b2cd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNet_87230723-00b5-4018-8057-094b0e901a1d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccountsReceivableNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_bedc98cc-8451-4069-a515-bdb62a264cc2" xlink:to="loc_us-gaap_AccountsReceivableNet_87230723-00b5-4018-8057-094b0e901a1d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiability_49c19166-6d6d-4c32-98e8-2087a03b80f2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ContractWithCustomerLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_bedc98cc-8451-4069-a515-bdb62a264cc2" xlink:to="loc_us-gaap_ContractWithCustomerLiability_49c19166-6d6d-4c32-98e8-2087a03b80f2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_ContractWithCustomerPolicyPeriod_2c9206de-92e8-408d-bc03-292cadd3fbe6" xlink:href="fnf-20231231.xsd#fnf_ContractWithCustomerPolicyPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_bedc98cc-8451-4069-a515-bdb62a264cc2" xlink:to="loc_fnf_ContractWithCustomerPolicyPeriod_2c9206de-92e8-408d-bc03-292cadd3fbe6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_02abf55e-1044-4075-bd30-53e14181554f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ContractWithCustomerLiabilityRevenueRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_bedc98cc-8451-4069-a515-bdb62a264cc2" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityRevenueRecognized_02abf55e-1044-4075-bd30-53e14181554f" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/OtherIntangibleAssetsReconciliationofOtherIntangiblestoBalanceSheetDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#OtherIntangibleAssetsReconciliationofOtherIntangiblestoBalanceSheetDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/OtherIntangibleAssetsReconciliationofOtherIntangiblestoBalanceSheetDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_06420294-624e-4d85-91da-2d21328da305" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_53c8721a-9f6d-4ae3-a2d9-728cde24ad0e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_06420294-624e-4d85-91da-2d21328da305" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_53c8721a-9f6d-4ae3-a2d9-728cde24ad0e" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_be345a7c-01c4-43d5-aa4f-7ae088bb2b37" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_53c8721a-9f6d-4ae3-a2d9-728cde24ad0e" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_be345a7c-01c4-43d5-aa4f-7ae088bb2b37" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_be345a7c-01c4-43d5-aa4f-7ae088bb2b37_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_be345a7c-01c4-43d5-aa4f-7ae088bb2b37" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_be345a7c-01c4-43d5-aa4f-7ae088bb2b37_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_2d87a2fc-21cc-4c6b-9272-d57a5044fca7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_be345a7c-01c4-43d5-aa4f-7ae088bb2b37" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_2d87a2fc-21cc-4c6b-9272-d57a5044fca7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_ValueOfDistributionAssetMember_e6e08db9-7e56-4f9f-b312-6691b895c7aa" xlink:href="fnf-20231231.xsd#fnf_ValueOfDistributionAssetMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_2d87a2fc-21cc-4c6b-9272-d57a5044fca7" xlink:to="loc_fnf_ValueOfDistributionAssetMember_e6e08db9-7e56-4f9f-b312-6691b895c7aa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComputerSoftwareIntangibleAssetMember_eaa3a295-6c5b-4bb0-b329-aef48174bef0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ComputerSoftwareIntangibleAssetMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_2d87a2fc-21cc-4c6b-9272-d57a5044fca7" xlink:to="loc_us-gaap_ComputerSoftwareIntangibleAssetMember_eaa3a295-6c5b-4bb0-b329-aef48174bef0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_CustomerRelationshipsAndContractsMember_81712cae-4bfe-4841-a2a3-f0162da048e6" xlink:href="fnf-20231231.xsd#fnf_CustomerRelationshipsAndContractsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_2d87a2fc-21cc-4c6b-9272-d57a5044fca7" xlink:to="loc_fnf_CustomerRelationshipsAndContractsMember_81712cae-4bfe-4841-a2a3-f0162da048e6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_TrademarksTradenamesAndOtherMember_14db45a6-9935-4fca-9229-5a8adfa887d8" xlink:href="fnf-20231231.xsd#fnf_TrademarksTradenamesAndOtherMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_2d87a2fc-21cc-4c6b-9272-d57a5044fca7" xlink:to="loc_fnf_TrademarksTradenamesAndOtherMember_14db45a6-9935-4fca-9229-5a8adfa887d8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValueOfBusinessAcquiredVOBA_cf57e57e-bfcd-4308-aa83-348d6c2154ff" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ValueOfBusinessAcquiredVOBA"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_06420294-624e-4d85-91da-2d21328da305" xlink:to="loc_us-gaap_ValueOfBusinessAcquiredVOBA_cf57e57e-bfcd-4308-aa83-348d6c2154ff" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_DeferredPolicyAcquisitionCostsIncludingFundingAgreements_f40629cf-a643-4197-8c5d-666337b502e3" xlink:href="fnf-20231231.xsd#fnf_DeferredPolicyAcquisitionCostsIncludingFundingAgreements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_06420294-624e-4d85-91da-2d21328da305" xlink:to="loc_fnf_DeferredPolicyAcquisitionCostsIncludingFundingAgreements_f40629cf-a643-4197-8c5d-666337b502e3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredSalesInducementsNet_0b94040d-ae33-4520-b526-6c7056e12231" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredSalesInducementsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_06420294-624e-4d85-91da-2d21328da305" xlink:to="loc_us-gaap_DeferredSalesInducementsNet_0b94040d-ae33-4520-b526-6c7056e12231" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_41bde1c4-3f75-4758-9eb7-dd083854b9e4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_06420294-624e-4d85-91da-2d21328da305" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_41bde1c4-3f75-4758-9eb7-dd083854b9e4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_fbe0efe0-6670-4160-86fa-e9e7ea9f84de" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_06420294-624e-4d85-91da-2d21328da305" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_fbe0efe0-6670-4160-86fa-e9e7ea9f84de" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/OtherIntangibleAssetsVOBADetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#OtherIntangibleAssetsVOBADetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/OtherIntangibleAssetsVOBADetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PresentValueOfFutureInsuranceProfitLineItems_1bcb45a1-e60a-4ca1-bda1-50ad766d338c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PresentValueOfFutureInsuranceProfitLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PresentValueOfFutureInsuranceProfitTable_52352a7f-4f7b-4cd3-89f8-630af414721b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PresentValueOfFutureInsuranceProfitTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PresentValueOfFutureInsuranceProfitLineItems_1bcb45a1-e60a-4ca1-bda1-50ad766d338c" xlink:to="loc_us-gaap_PresentValueOfFutureInsuranceProfitTable_52352a7f-4f7b-4cd3-89f8-630af414721b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_f4bd1ddf-a23a-48e5-9e95-9f4dda30eace" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_PresentValueOfFutureInsuranceProfitTable_52352a7f-4f7b-4cd3-89f8-630af414721b" xlink:to="loc_srt_ProductOrServiceAxis_f4bd1ddf-a23a-48e5-9e95-9f4dda30eace" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_f4bd1ddf-a23a-48e5-9e95-9f4dda30eace_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_f4bd1ddf-a23a-48e5-9e95-9f4dda30eace" xlink:to="loc_srt_ProductsAndServicesDomain_f4bd1ddf-a23a-48e5-9e95-9f4dda30eace_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_11d2bf44-c673-4776-bba6-6ff951e62f00" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_f4bd1ddf-a23a-48e5-9e95-9f4dda30eace" xlink:to="loc_srt_ProductsAndServicesDomain_11d2bf44-c673-4776-bba6-6ff951e62f00" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FixedIndexAnnuityMember_b7e7f52a-1757-4a60-bf01-3e4810234fc7" xlink:href="fnf-20231231.xsd#fnf_FixedIndexAnnuityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_11d2bf44-c673-4776-bba6-6ff951e62f00" xlink:to="loc_fnf_FixedIndexAnnuityMember_b7e7f52a-1757-4a60-bf01-3e4810234fc7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FixedAnnuityMember_a614fdb8-e9cd-4681-8e61-565ecff467ad" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FixedAnnuityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_11d2bf44-c673-4776-bba6-6ff951e62f00" xlink:to="loc_us-gaap_FixedAnnuityMember_a614fdb8-e9cd-4681-8e61-565ecff467ad" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_ImmediateAnnuityMember_68628aeb-97f7-44d5-9d9c-d7305313e46c" xlink:href="fnf-20231231.xsd#fnf_ImmediateAnnuityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_11d2bf44-c673-4776-bba6-6ff951e62f00" xlink:to="loc_fnf_ImmediateAnnuityMember_68628aeb-97f7-44d5-9d9c-d7305313e46c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UniversalLifeMember_9acee966-ce9f-42aa-bd2c-dea71d28d48a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UniversalLifeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_11d2bf44-c673-4776-bba6-6ff951e62f00" xlink:to="loc_us-gaap_UniversalLifeMember_9acee966-ce9f-42aa-bd2c-dea71d28d48a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_TraditionalLifeInsuranceMember_83a09efd-113c-4fbc-b69a-183012946b7c" xlink:href="fnf-20231231.xsd#fnf_TraditionalLifeInsuranceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_11d2bf44-c673-4776-bba6-6ff951e62f00" xlink:to="loc_fnf_TraditionalLifeInsuranceMember_83a09efd-113c-4fbc-b69a-183012946b7c" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MovementInPresentValueOfFutureInsuranceProfitsRollForward_2b39689a-2541-4a97-a8f2-6ca38ae1bf8c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MovementInPresentValueOfFutureInsuranceProfitsRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PresentValueOfFutureInsuranceProfitLineItems_1bcb45a1-e60a-4ca1-bda1-50ad766d338c" xlink:to="loc_us-gaap_MovementInPresentValueOfFutureInsuranceProfitsRollForward_2b39689a-2541-4a97-a8f2-6ca38ae1bf8c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValueOfBusinessAcquiredVOBA_67a2ffa4-db49-42de-9e66-630e4ee71a93" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ValueOfBusinessAcquiredVOBA"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInPresentValueOfFutureInsuranceProfitsRollForward_2b39689a-2541-4a97-a8f2-6ca38ae1bf8c" xlink:to="loc_us-gaap_ValueOfBusinessAcquiredVOBA_67a2ffa4-db49-42de-9e66-630e4ee71a93" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PresentValueOfFutureInsuranceProfitsAmortizationExpense1_b3e4e0c0-343a-482e-bf75-7c1677b6176e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PresentValueOfFutureInsuranceProfitsAmortizationExpense1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInPresentValueOfFutureInsuranceProfitsRollForward_2b39689a-2541-4a97-a8f2-6ca38ae1bf8c" xlink:to="loc_us-gaap_PresentValueOfFutureInsuranceProfitsAmortizationExpense1_b3e4e0c0-343a-482e-bf75-7c1677b6176e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PresentValueOfFutureInsuranceProfitExperienceAdjustment_51b709b4-00d4-410c-af5f-1d110d45a3f8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PresentValueOfFutureInsuranceProfitExperienceAdjustment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInPresentValueOfFutureInsuranceProfitsRollForward_2b39689a-2541-4a97-a8f2-6ca38ae1bf8c" xlink:to="loc_us-gaap_PresentValueOfFutureInsuranceProfitExperienceAdjustment_51b709b4-00d4-410c-af5f-1d110d45a3f8" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValueOfBusinessAcquiredVOBA_6dee6211-8bcb-49a8-acf8-d26431171436" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ValueOfBusinessAcquiredVOBA"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/OtherIntangibleAssetsReconciliationofVOBADACandDSItotheCondensedConsolidatedBalanceSheetsDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#OtherIntangibleAssetsReconciliationofVOBADACandDSItotheCondensedConsolidatedBalanceSheetsDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/OtherIntangibleAssetsReconciliationofVOBADACandDSItotheCondensedConsolidatedBalanceSheetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_f8c5195b-46d4-4f57-b82a-1ef8e522a6aa" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_bc61d7b1-d23c-467f-bc29-4f6ddacc46e7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_f8c5195b-46d4-4f57-b82a-1ef8e522a6aa" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_bc61d7b1-d23c-467f-bc29-4f6ddacc46e7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_571caa3a-87ae-41fd-bac5-0947127b2ef3" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_bc61d7b1-d23c-467f-bc29-4f6ddacc46e7" xlink:to="loc_srt_ProductOrServiceAxis_571caa3a-87ae-41fd-bac5-0947127b2ef3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_571caa3a-87ae-41fd-bac5-0947127b2ef3_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_571caa3a-87ae-41fd-bac5-0947127b2ef3" xlink:to="loc_srt_ProductsAndServicesDomain_571caa3a-87ae-41fd-bac5-0947127b2ef3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_e523875b-fe9f-4aa3-b9db-058cdb7604ee" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_571caa3a-87ae-41fd-bac5-0947127b2ef3" xlink:to="loc_srt_ProductsAndServicesDomain_e523875b-fe9f-4aa3-b9db-058cdb7604ee" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FixedIndexAnnuityMember_1894cb04-513c-4ede-b6f5-7196d4ccb242" xlink:href="fnf-20231231.xsd#fnf_FixedIndexAnnuityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_e523875b-fe9f-4aa3-b9db-058cdb7604ee" xlink:to="loc_fnf_FixedIndexAnnuityMember_1894cb04-513c-4ede-b6f5-7196d4ccb242" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FixedAnnuityMember_f68e3c8b-4c69-4890-b5c5-dd5546d0cd37" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FixedAnnuityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_e523875b-fe9f-4aa3-b9db-058cdb7604ee" xlink:to="loc_us-gaap_FixedAnnuityMember_f68e3c8b-4c69-4890-b5c5-dd5546d0cd37" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_ImmediateAnnuityMember_2097fbfb-eefc-49b4-8e5e-ea1e2ac96c61" xlink:href="fnf-20231231.xsd#fnf_ImmediateAnnuityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_e523875b-fe9f-4aa3-b9db-058cdb7604ee" xlink:to="loc_fnf_ImmediateAnnuityMember_2097fbfb-eefc-49b4-8e5e-ea1e2ac96c61" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UniversalLifeMember_5dc8a592-192a-4469-9b60-f3f025a15185" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UniversalLifeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_e523875b-fe9f-4aa3-b9db-058cdb7604ee" xlink:to="loc_us-gaap_UniversalLifeMember_5dc8a592-192a-4469-9b60-f3f025a15185" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_TraditionalLifeInsuranceMember_d1a8f33b-67d2-410c-b329-584ec8cef072" xlink:href="fnf-20231231.xsd#fnf_TraditionalLifeInsuranceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_e523875b-fe9f-4aa3-b9db-058cdb7604ee" xlink:to="loc_fnf_TraditionalLifeInsuranceMember_d1a8f33b-67d2-410c-b329-584ec8cef072" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FundingAgreementsMember_fa50535e-3e8e-4b0b-a7fa-ecaa7145ea93" xlink:href="fnf-20231231.xsd#fnf_FundingAgreementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_e523875b-fe9f-4aa3-b9db-058cdb7604ee" xlink:to="loc_fnf_FundingAgreementsMember_fa50535e-3e8e-4b0b-a7fa-ecaa7145ea93" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValueOfBusinessAcquiredVOBA_cb91db81-aa6f-42f0-92de-35f92172bf86" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ValueOfBusinessAcquiredVOBA"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_f8c5195b-46d4-4f57-b82a-1ef8e522a6aa" xlink:to="loc_us-gaap_ValueOfBusinessAcquiredVOBA_cb91db81-aa6f-42f0-92de-35f92172bf86" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_DeferredPolicyAcquisitionCostsIncludingFundingAgreements_73557e42-d19a-44db-9ea4-1f6dc42a3d05" xlink:href="fnf-20231231.xsd#fnf_DeferredPolicyAcquisitionCostsIncludingFundingAgreements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_f8c5195b-46d4-4f57-b82a-1ef8e522a6aa" xlink:to="loc_fnf_DeferredPolicyAcquisitionCostsIncludingFundingAgreements_73557e42-d19a-44db-9ea4-1f6dc42a3d05" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredSalesInducementsNet_e8be3694-bec7-4265-b3b7-3a815b56e883" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredSalesInducementsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_f8c5195b-46d4-4f57-b82a-1ef8e522a6aa" xlink:to="loc_us-gaap_DeferredSalesInducementsNet_e8be3694-bec7-4265-b3b7-3a815b56e883" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/OtherIntangibleAssetsDACDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#OtherIntangibleAssetsDACDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/OtherIntangibleAssetsDACDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredPolicyAcquisitionCostLineItems_b4245f23-87a0-4d98-b5b9-91811b8b6ac4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredPolicyAcquisitionCostLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredPolicyAcquisitionCostTable_e26eb557-05a0-4bc6-9255-beef52d85330" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredPolicyAcquisitionCostTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DeferredPolicyAcquisitionCostLineItems_b4245f23-87a0-4d98-b5b9-91811b8b6ac4" xlink:to="loc_us-gaap_DeferredPolicyAcquisitionCostTable_e26eb557-05a0-4bc6-9255-beef52d85330" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_9c12c820-6964-4972-a3c8-a4fe254d00a6" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DeferredPolicyAcquisitionCostTable_e26eb557-05a0-4bc6-9255-beef52d85330" xlink:to="loc_srt_ProductOrServiceAxis_9c12c820-6964-4972-a3c8-a4fe254d00a6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_9c12c820-6964-4972-a3c8-a4fe254d00a6_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_9c12c820-6964-4972-a3c8-a4fe254d00a6" xlink:to="loc_srt_ProductsAndServicesDomain_9c12c820-6964-4972-a3c8-a4fe254d00a6_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_5a171d53-9306-4e57-a178-c154369faae4" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_9c12c820-6964-4972-a3c8-a4fe254d00a6" xlink:to="loc_srt_ProductsAndServicesDomain_5a171d53-9306-4e57-a178-c154369faae4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FixedIndexAnnuityMember_cfa7570a-3af5-47f9-89e5-b72563cfaca7" xlink:href="fnf-20231231.xsd#fnf_FixedIndexAnnuityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_5a171d53-9306-4e57-a178-c154369faae4" xlink:to="loc_fnf_FixedIndexAnnuityMember_cfa7570a-3af5-47f9-89e5-b72563cfaca7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FixedAnnuityMember_87930ef3-0d4b-4d5b-a2db-778796dd28c9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FixedAnnuityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_5a171d53-9306-4e57-a178-c154369faae4" xlink:to="loc_us-gaap_FixedAnnuityMember_87930ef3-0d4b-4d5b-a2db-778796dd28c9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UniversalLifeMember_378f69b3-1f03-401e-b319-e797397fcfef" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UniversalLifeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_5a171d53-9306-4e57-a178-c154369faae4" xlink:to="loc_us-gaap_UniversalLifeMember_378f69b3-1f03-401e-b319-e797397fcfef" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MovementAnalysisOfDeferredPolicyAcquisitionCostsRollForward_6a4e0cab-1898-46cd-8926-7b9fb51ceaf2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MovementAnalysisOfDeferredPolicyAcquisitionCostsRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredPolicyAcquisitionCostLineItems_b4245f23-87a0-4d98-b5b9-91811b8b6ac4" xlink:to="loc_us-gaap_MovementAnalysisOfDeferredPolicyAcquisitionCostsRollForward_6a4e0cab-1898-46cd-8926-7b9fb51ceaf2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredPolicyAcquisitionCosts_b00a865d-a06d-4787-9a47-b0743a685490" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredPolicyAcquisitionCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementAnalysisOfDeferredPolicyAcquisitionCostsRollForward_6a4e0cab-1898-46cd-8926-7b9fb51ceaf2" xlink:to="loc_us-gaap_DeferredPolicyAcquisitionCosts_b00a865d-a06d-4787-9a47-b0743a685490" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredPolicyAcquisitionCostsAdditions_3917632b-a432-4b4a-b3d8-1d543914f578" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredPolicyAcquisitionCostsAdditions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementAnalysisOfDeferredPolicyAcquisitionCostsRollForward_6a4e0cab-1898-46cd-8926-7b9fb51ceaf2" xlink:to="loc_us-gaap_DeferredPolicyAcquisitionCostsAdditions_3917632b-a432-4b4a-b3d8-1d543914f578" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense_1057a311-a789-4801-a6dc-592f8f98ac95" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementAnalysisOfDeferredPolicyAcquisitionCostsRollForward_6a4e0cab-1898-46cd-8926-7b9fb51ceaf2" xlink:to="loc_us-gaap_DeferredPolicyAcquisitionCostAmortizationExpense_1057a311-a789-4801-a6dc-592f8f98ac95" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_DeferredPolicyAcquisitionCostReinsuranceRelatedAdjustments_83bc0aee-1cc3-4750-aa7f-ec69dbfeeda6" xlink:href="fnf-20231231.xsd#fnf_DeferredPolicyAcquisitionCostReinsuranceRelatedAdjustments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementAnalysisOfDeferredPolicyAcquisitionCostsRollForward_6a4e0cab-1898-46cd-8926-7b9fb51ceaf2" xlink:to="loc_fnf_DeferredPolicyAcquisitionCostReinsuranceRelatedAdjustments_83bc0aee-1cc3-4750-aa7f-ec69dbfeeda6" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredPolicyAcquisitionCosts_1c08cc5c-d2f5-45e2-8c38-724cd8635710" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredPolicyAcquisitionCosts"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/OtherIntangibleAssetsDSIDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#OtherIntangibleAssetsDSIDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/OtherIntangibleAssetsDSIDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredSaleInducementCostLineItems_e3f7504c-7300-4841-ae34-693bc5a4fe70" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredSaleInducementCostLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredSaleInducementCostTable_0f3180ee-a1e5-42ac-b53b-eec5686b5691" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredSaleInducementCostTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DeferredSaleInducementCostLineItems_e3f7504c-7300-4841-ae34-693bc5a4fe70" xlink:to="loc_us-gaap_DeferredSaleInducementCostTable_0f3180ee-a1e5-42ac-b53b-eec5686b5691" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_d5bd1663-c90b-47ab-8ea6-bc7de21d9109" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DeferredSaleInducementCostTable_0f3180ee-a1e5-42ac-b53b-eec5686b5691" xlink:to="loc_srt_ProductOrServiceAxis_d5bd1663-c90b-47ab-8ea6-bc7de21d9109" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_d5bd1663-c90b-47ab-8ea6-bc7de21d9109_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_d5bd1663-c90b-47ab-8ea6-bc7de21d9109" xlink:to="loc_srt_ProductsAndServicesDomain_d5bd1663-c90b-47ab-8ea6-bc7de21d9109_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_6aa82302-df55-4955-b6b1-e03325ab93a1" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_d5bd1663-c90b-47ab-8ea6-bc7de21d9109" xlink:to="loc_srt_ProductsAndServicesDomain_6aa82302-df55-4955-b6b1-e03325ab93a1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FixedIndexAnnuityMember_f9b23a62-cb44-45c2-b357-5a76108a0cdf" xlink:href="fnf-20231231.xsd#fnf_FixedIndexAnnuityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_6aa82302-df55-4955-b6b1-e03325ab93a1" xlink:to="loc_fnf_FixedIndexAnnuityMember_f9b23a62-cb44-45c2-b357-5a76108a0cdf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MovementInDeferredSalesInducementsRollForward_345949b8-a3a5-4973-982c-dbfbda747697" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MovementInDeferredSalesInducementsRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredSaleInducementCostLineItems_e3f7504c-7300-4841-ae34-693bc5a4fe70" xlink:to="loc_us-gaap_MovementInDeferredSalesInducementsRollForward_345949b8-a3a5-4973-982c-dbfbda747697" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredSalesInducementsNet_1f34390e-f3d8-4fd6-b0f3-cd69a9a2e345" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredSalesInducementsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInDeferredSalesInducementsRollForward_345949b8-a3a5-4973-982c-dbfbda747697" xlink:to="loc_us-gaap_DeferredSalesInducementsNet_1f34390e-f3d8-4fd6-b0f3-cd69a9a2e345" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredSalesInducementsAdditions_b1a082ea-eabc-4c47-9caf-1e854cdce94b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredSalesInducementsAdditions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInDeferredSalesInducementsRollForward_345949b8-a3a5-4973-982c-dbfbda747697" xlink:to="loc_us-gaap_DeferredSalesInducementsAdditions_b1a082ea-eabc-4c47-9caf-1e854cdce94b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredSalesInducementsAmortizationExpense_c3e73894-5a86-49ca-8fac-2c4941eb8317" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredSalesInducementsAmortizationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MovementInDeferredSalesInducementsRollForward_345949b8-a3a5-4973-982c-dbfbda747697" xlink:to="loc_us-gaap_DeferredSalesInducementsAmortizationExpense_c3e73894-5a86-49ca-8fac-2c4941eb8317" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredSalesInducementsNet_d5b0dc39-476d-468b-a1ca-ebf1b840dffc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredSalesInducementsNet"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/OtherIntangibleAssetsDefiniteandIndefiniteLivedIntangibleAssetsDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#OtherIntangibleAssetsDefiniteandIndefiniteLivedIntangibleAssetsDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/OtherIntangibleAssetsDefiniteandIndefiniteLivedIntangibleAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_a975622e-a366-45db-b764-87681ad3f3f3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_cce749d7-d4fc-49f9-84ad-82be792cc00a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_a975622e-a366-45db-b764-87681ad3f3f3" xlink:to="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_cce749d7-d4fc-49f9-84ad-82be792cc00a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_4580ff1d-8918-414f-87c6-88f96b361dc4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_cce749d7-d4fc-49f9-84ad-82be792cc00a" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_4580ff1d-8918-414f-87c6-88f96b361dc4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_4580ff1d-8918-414f-87c6-88f96b361dc4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_4580ff1d-8918-414f-87c6-88f96b361dc4" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_4580ff1d-8918-414f-87c6-88f96b361dc4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_248ecd57-e2fb-4c83-96e6-39ee3c57299b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_4580ff1d-8918-414f-87c6-88f96b361dc4" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_248ecd57-e2fb-4c83-96e6-39ee3c57299b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_CustomerRelationshipsAndContractsMember_ab7dcf5f-4b7e-458d-a186-3ee3fb838cc3" xlink:href="fnf-20231231.xsd#fnf_CustomerRelationshipsAndContractsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_248ecd57-e2fb-4c83-96e6-39ee3c57299b" xlink:to="loc_fnf_CustomerRelationshipsAndContractsMember_ab7dcf5f-4b7e-458d-a186-3ee3fb838cc3" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComputerSoftwareIntangibleAssetMember_8155adfa-5040-4de3-b0f7-f8a642db93e8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ComputerSoftwareIntangibleAssetMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_248ecd57-e2fb-4c83-96e6-39ee3c57299b" xlink:to="loc_us-gaap_ComputerSoftwareIntangibleAssetMember_8155adfa-5040-4de3-b0f7-f8a642db93e8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_ValueOfDistributionAssetMember_f9c98a42-268d-4462-a1fe-bf668c38ef8d" xlink:href="fnf-20231231.xsd#fnf_ValueOfDistributionAssetMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_248ecd57-e2fb-4c83-96e6-39ee3c57299b" xlink:to="loc_fnf_ValueOfDistributionAssetMember_f9c98a42-268d-4462-a1fe-bf668c38ef8d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TrademarksAndTradeNamesMember_87670011-ada9-4025-9189-f3dc92a3d0e6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TrademarksAndTradeNamesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsMajorClassNameDomain_248ecd57-e2fb-4c83-96e6-39ee3c57299b" xlink:to="loc_us-gaap_TrademarksAndTradeNamesMember_87670011-ada9-4025-9189-f3dc92a3d0e6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_396dd1a0-5afc-4a8d-b82a-a21fbe7c79a7" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfFiniteLivedIntangibleAssetsTable_cce749d7-d4fc-49f9-84ad-82be792cc00a" xlink:to="loc_srt_RangeAxis_396dd1a0-5afc-4a8d-b82a-a21fbe7c79a7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_396dd1a0-5afc-4a8d-b82a-a21fbe7c79a7_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_396dd1a0-5afc-4a8d-b82a-a21fbe7c79a7" xlink:to="loc_srt_RangeMember_396dd1a0-5afc-4a8d-b82a-a21fbe7c79a7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_d3a1a77a-fc02-42d7-a883-379f00fe0297" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_396dd1a0-5afc-4a8d-b82a-a21fbe7c79a7" xlink:to="loc_srt_RangeMember_d3a1a77a-fc02-42d7-a883-379f00fe0297" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_14366b2d-d5d5-4f80-ab81-ad1edaddd812" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_d3a1a77a-fc02-42d7-a883-379f00fe0297" xlink:to="loc_srt_MinimumMember_14366b2d-d5d5-4f80-ab81-ad1edaddd812" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_caf2fae8-b593-4f4e-a2ba-080d2da7a243" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_d3a1a77a-fc02-42d7-a883-379f00fe0297" xlink:to="loc_srt_MaximumMember_caf2fae8-b593-4f4e-a2ba-080d2da7a243" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_3d53df87-00bc-4449-8731-8aa0f0827001" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_a975622e-a366-45db-b764-87681ad3f3f3" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_3d53df87-00bc-4449-8731-8aa0f0827001" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_78e59552-3e7e-418a-afd3-0f017d67e64d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_a975622e-a366-45db-b764-87681ad3f3f3" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_78e59552-3e7e-418a-afd3-0f017d67e64d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_4773352f-4e43-47d8-a1a0-3d216e74615a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_a975622e-a366-45db-b764-87681ad3f3f3" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsNet_4773352f-4e43-47d8-a1a0-3d216e74615a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_356f34e0-6d9c-4c15-bf06-f5549c42006b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_a975622e-a366-45db-b764-87681ad3f3f3" xlink:to="loc_us-gaap_AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife_356f34e0-6d9c-4c15-bf06-f5549c42006b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherIntangibleAssetsNet_804897e9-c0bf-4488-9031-6dc75e79ae80" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherIntangibleAssetsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsLineItems_a975622e-a366-45db-b764-87681ad3f3f3" xlink:to="loc_us-gaap_OtherIntangibleAssetsNet_804897e9-c0bf-4488-9031-6dc75e79ae80" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/GoodwillDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#GoodwillDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/GoodwillDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillLineItems_d2467f46-3a4d-4a3d-9d76-e9fd1ae2c705" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GoodwillLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfGoodwillTable_a08d632d-3df2-4936-a214-b86bd69ec6f4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfGoodwillTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_GoodwillLineItems_d2467f46-3a4d-4a3d-9d76-e9fd1ae2c705" xlink:to="loc_us-gaap_ScheduleOfGoodwillTable_a08d632d-3df2-4936-a214-b86bd69ec6f4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsegmentsAxis_3ca71d18-a29d-4c64-97b9-e6fdbbdda565" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SubsegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_a08d632d-3df2-4936-a214-b86bd69ec6f4" xlink:to="loc_us-gaap_SubsegmentsAxis_3ca71d18-a29d-4c64-97b9-e6fdbbdda565" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsegmentsDomain_3ca71d18-a29d-4c64-97b9-e6fdbbdda565_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SubsegmentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsegmentsAxis_3ca71d18-a29d-4c64-97b9-e6fdbbdda565" xlink:to="loc_us-gaap_SubsegmentsDomain_3ca71d18-a29d-4c64-97b9-e6fdbbdda565_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsegmentsDomain_6b4f4429-eb58-4d2d-9927-94a2c937b580" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SubsegmentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsegmentsAxis_3ca71d18-a29d-4c64-97b9-e6fdbbdda565" xlink:to="loc_us-gaap_SubsegmentsDomain_6b4f4429-eb58-4d2d-9927-94a2c937b580" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_TitleSegmentMember_47fe939c-3176-453b-aade-687e41300c78" xlink:href="fnf-20231231.xsd#fnf_TitleSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsegmentsDomain_6b4f4429-eb58-4d2d-9927-94a2c937b580" xlink:to="loc_fnf_TitleSegmentMember_47fe939c-3176-453b-aade-687e41300c78" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FGMember_954380b9-0cd1-463d-a2a7-e85d91b3ce6f" xlink:href="fnf-20231231.xsd#fnf_FGMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsegmentsDomain_6b4f4429-eb58-4d2d-9927-94a2c937b580" xlink:to="loc_fnf_FGMember_954380b9-0cd1-463d-a2a7-e85d91b3ce6f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FidelityNationalFinancialCoreCorporateandOtherSubsegmentMember_43aeb40b-66e9-40fb-83d9-40d03d386c8a" xlink:href="fnf-20231231.xsd#fnf_FidelityNationalFinancialCoreCorporateandOtherSubsegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsegmentsDomain_6b4f4429-eb58-4d2d-9927-94a2c937b580" xlink:to="loc_fnf_FidelityNationalFinancialCoreCorporateandOtherSubsegmentMember_43aeb40b-66e9-40fb-83d9-40d03d386c8a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsAxis_2953dccd-e945-46a4-bb26-d4ff59dc2d87" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidationItemsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfGoodwillTable_a08d632d-3df2-4936-a214-b86bd69ec6f4" xlink:to="loc_srt_ConsolidationItemsAxis_2953dccd-e945-46a4-bb26-d4ff59dc2d87" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_2953dccd-e945-46a4-bb26-d4ff59dc2d87_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidationItemsAxis_2953dccd-e945-46a4-bb26-d4ff59dc2d87" xlink:to="loc_srt_ConsolidationItemsDomain_2953dccd-e945-46a4-bb26-d4ff59dc2d87_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidationItemsDomain_de896335-d83b-4d20-b939-e1c33f03e367" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidationItemsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidationItemsAxis_2953dccd-e945-46a4-bb26-d4ff59dc2d87" xlink:to="loc_srt_ConsolidationItemsDomain_de896335-d83b-4d20-b939-e1c33f03e367" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingSegmentsMember_a15ad558-7eb7-4387-8c3e-298a9e67f03a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingSegmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidationItemsDomain_de896335-d83b-4d20-b939-e1c33f03e367" xlink:to="loc_us-gaap_OperatingSegmentsMember_a15ad558-7eb7-4387-8c3e-298a9e67f03a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillRollForward_a1cb009c-c89c-42ac-b081-f319f895a723" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GoodwillRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillLineItems_d2467f46-3a4d-4a3d-9d76-e9fd1ae2c705" xlink:to="loc_us-gaap_GoodwillRollForward_a1cb009c-c89c-42ac-b081-f319f895a723" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_a1b89d71-daca-4f2c-b4ee-65c3fb79c442" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Goodwill"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_a1cb009c-c89c-42ac-b081-f319f895a723" xlink:to="loc_us-gaap_Goodwill_a1b89d71-daca-4f2c-b4ee-65c3fb79c442" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GoodwillAcquiredDuringPeriod_95664109-dd14-4756-a022-04e29c2b3a4c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GoodwillAcquiredDuringPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_GoodwillRollForward_a1cb009c-c89c-42ac-b081-f319f895a723" xlink:to="loc_us-gaap_GoodwillAcquiredDuringPeriod_95664109-dd14-4756-a022-04e29c2b3a4c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_f8d4b6d6-d274-4e61-b764-7d3b6e835bcc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Goodwill"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/FGReinsuranceEffectofReinsuranceonPremiumsEarnedBenefitsIncurredandReserveChangesDetail" xlink:type="simple" xlink:href="fnf-20231231.xsd#FGReinsuranceEffectofReinsuranceonPremiumsEarnedBenefitsIncurredandReserveChangesDetail"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/FGReinsuranceEffectofReinsuranceonPremiumsEarnedBenefitsIncurredandReserveChangesDetail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectsOfReinsuranceLineItems_63b534d6-963f-46d9-98bd-6ac0df187e8a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EffectsOfReinsuranceLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectsOfReinsuranceTable_78b4ea33-3352-425e-855b-9f035d73ed09" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EffectsOfReinsuranceTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EffectsOfReinsuranceLineItems_63b534d6-963f-46d9-98bd-6ac0df187e8a" xlink:to="loc_us-gaap_EffectsOfReinsuranceTable_78b4ea33-3352-425e-855b-9f035d73ed09" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_02739ba3-cd61-4f1d-8abc-9b6a9df13475" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_EffectsOfReinsuranceTable_78b4ea33-3352-425e-855b-9f035d73ed09" xlink:to="loc_srt_ProductOrServiceAxis_02739ba3-cd61-4f1d-8abc-9b6a9df13475" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_02739ba3-cd61-4f1d-8abc-9b6a9df13475_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_02739ba3-cd61-4f1d-8abc-9b6a9df13475" xlink:to="loc_srt_ProductsAndServicesDomain_02739ba3-cd61-4f1d-8abc-9b6a9df13475_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_6c3f8785-b22b-47f3-a1ca-285390fb2a7c" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_02739ba3-cd61-4f1d-8abc-9b6a9df13475" xlink:to="loc_srt_ProductsAndServicesDomain_6c3f8785-b22b-47f3-a1ca-285390fb2a7c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LifeInsuranceSegmentMember_04a9d443-da1f-4ea2-9c7b-9be696e936bf" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LifeInsuranceSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_6c3f8785-b22b-47f3-a1ca-285390fb2a7c" xlink:to="loc_us-gaap_LifeInsuranceSegmentMember_04a9d443-da1f-4ea2-9c7b-9be696e936bf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentNetAmountAbstract_a157744f-5b75-4768-98e0-bf5a12940e27" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentNetAmountAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectsOfReinsuranceLineItems_63b534d6-963f-46d9-98bd-6ac0df187e8a" xlink:to="loc_us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentNetAmountAbstract_a157744f-5b75-4768-98e0-bf5a12940e27" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DirectPremiumsEarned_03c449bb-1126-4339-866b-ead94eb2828d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DirectPremiumsEarned"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentNetAmountAbstract_a157744f-5b75-4768-98e0-bf5a12940e27" xlink:to="loc_us-gaap_DirectPremiumsEarned_03c449bb-1126-4339-866b-ead94eb2828d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CededPremiumsEarned_f9483b52-3e62-4400-a8d8-896f475bcf6f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CededPremiumsEarned"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentNetAmountAbstract_a157744f-5b75-4768-98e0-bf5a12940e27" xlink:to="loc_us-gaap_CededPremiumsEarned_f9483b52-3e62-4400-a8d8-896f475bcf6f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PremiumsEarnedNet_74b3fe22-b325-4780-8e05-5f784a8c931d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PremiumsEarnedNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentNetAmountAbstract_a157744f-5b75-4768-98e0-bf5a12940e27" xlink:to="loc_us-gaap_PremiumsEarnedNet_74b3fe22-b325-4780-8e05-5f784a8c931d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PolicyholderBenefitsAndClaimsIncurredAbstract_ce3f82c3-1626-4f89-a9af-c7d610e8392f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PolicyholderBenefitsAndClaimsIncurredAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectsOfReinsuranceLineItems_63b534d6-963f-46d9-98bd-6ac0df187e8a" xlink:to="loc_us-gaap_PolicyholderBenefitsAndClaimsIncurredAbstract_ce3f82c3-1626-4f89-a9af-c7d610e8392f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PolicyholderBenefitsAndClaimsIncurredGross_027f290b-5222-4600-92d7-1dc41aa24ec1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PolicyholderBenefitsAndClaimsIncurredGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PolicyholderBenefitsAndClaimsIncurredAbstract_ce3f82c3-1626-4f89-a9af-c7d610e8392f" xlink:to="loc_us-gaap_PolicyholderBenefitsAndClaimsIncurredGross_027f290b-5222-4600-92d7-1dc41aa24ec1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded_0e3e6fd2-74a6-4252-8e2d-eebfba780c0b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PolicyholderBenefitsAndClaimsIncurredAbstract_ce3f82c3-1626-4f89-a9af-c7d610e8392f" xlink:to="loc_us-gaap_ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded_0e3e6fd2-74a6-4252-8e2d-eebfba780c0b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PolicyholderBenefitsAndClaimsIncurredNet_c6d632f5-c4c3-4604-a4af-b2a3c50e8514" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PolicyholderBenefitsAndClaimsIncurredNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PolicyholderBenefitsAndClaimsIncurredAbstract_ce3f82c3-1626-4f89-a9af-c7d610e8392f" xlink:to="loc_us-gaap_PolicyholderBenefitsAndClaimsIncurredNet_c6d632f5-c4c3-4604-a4af-b2a3c50e8514" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/FGReinsuranceNarrativeDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#FGReinsuranceNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/FGReinsuranceNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectsOfReinsuranceLineItems_8cb73035-fff3-4fb3-b27b-5f62769cad8d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EffectsOfReinsuranceLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CededCreditRiskTable_eda7c7a9-05d0-4f09-9f2f-16da3f1015f7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CededCreditRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EffectsOfReinsuranceLineItems_8cb73035-fff3-4fb3-b27b-5f62769cad8d" xlink:to="loc_us-gaap_CededCreditRiskTable_eda7c7a9-05d0-4f09-9f2f-16da3f1015f7" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CededCreditRiskAxis_f2d88903-4f3b-41d1-a182-d58c58ff98c0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CededCreditRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_CededCreditRiskTable_eda7c7a9-05d0-4f09-9f2f-16da3f1015f7" xlink:to="loc_us-gaap_CededCreditRiskAxis_f2d88903-4f3b-41d1-a182-d58c58ff98c0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CededCreditRiskReinsurerDomain_f2d88903-4f3b-41d1-a182-d58c58ff98c0_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CededCreditRiskReinsurerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CededCreditRiskAxis_f2d88903-4f3b-41d1-a182-d58c58ff98c0" xlink:to="loc_us-gaap_CededCreditRiskReinsurerDomain_f2d88903-4f3b-41d1-a182-d58c58ff98c0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CededCreditRiskReinsurerDomain_b7b99aa4-55bc-4f4c-81eb-ed6ff317e982" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CededCreditRiskReinsurerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CededCreditRiskAxis_f2d88903-4f3b-41d1-a182-d58c58ff98c0" xlink:to="loc_us-gaap_CededCreditRiskReinsurerDomain_b7b99aa4-55bc-4f4c-81eb-ed6ff317e982" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_CanadaLifeAssuranceCompanyUSMember_38d89b51-ae68-4b30-aa44-246c147a54ac" xlink:href="fnf-20231231.xsd#fnf_CanadaLifeAssuranceCompanyUSMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CededCreditRiskReinsurerDomain_b7b99aa4-55bc-4f4c-81eb-ed6ff317e982" xlink:to="loc_fnf_CanadaLifeAssuranceCompanyUSMember_38d89b51-ae68-4b30-aa44-246c147a54ac" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_RavenReinsuranceCompanyMember_10e225ac-b2a9-45fe-821d-519f19d17bc7" xlink:href="fnf-20231231.xsd#fnf_RavenReinsuranceCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CededCreditRiskReinsurerDomain_b7b99aa4-55bc-4f4c-81eb-ed6ff317e982" xlink:to="loc_fnf_RavenReinsuranceCompanyMember_10e225ac-b2a9-45fe-821d-519f19d17bc7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FGCaymanReLtdMember_946828bb-addf-4cfc-bfd7-933528b14e69" xlink:href="fnf-20231231.xsd#fnf_FGCaymanReLtdMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CededCreditRiskReinsurerDomain_b7b99aa4-55bc-4f4c-81eb-ed6ff317e982" xlink:to="loc_fnf_FGCaymanReLtdMember_946828bb-addf-4cfc-bfd7-933528b14e69" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_CorbeauReMember_c167a34f-5fe7-4272-96c7-6694ba709863" xlink:href="fnf-20231231.xsd#fnf_CorbeauReMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CededCreditRiskReinsurerDomain_b7b99aa4-55bc-4f4c-81eb-ed6ff317e982" xlink:to="loc_fnf_CorbeauReMember_c167a34f-5fe7-4272-96c7-6694ba709863" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionAxis_cdeb4b8a-3049-4a32-b768-ec7dfb05e8c4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RelatedPartyTransactionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_CededCreditRiskTable_eda7c7a9-05d0-4f09-9f2f-16da3f1015f7" xlink:to="loc_us-gaap_RelatedPartyTransactionAxis_cdeb4b8a-3049-4a32-b768-ec7dfb05e8c4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_cdeb4b8a-3049-4a32-b768-ec7dfb05e8c4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_cdeb4b8a-3049-4a32-b768-ec7dfb05e8c4" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_cdeb4b8a-3049-4a32-b768-ec7dfb05e8c4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionDomain_cd68d7d6-7e5d-450a-bafe-3448aa59b604" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RelatedPartyTransactionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionAxis_cdeb4b8a-3049-4a32-b768-ec7dfb05e8c4" xlink:to="loc_us-gaap_RelatedPartyTransactionDomain_cd68d7d6-7e5d-450a-bafe-3448aa59b604" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_IntercompanyReinsuranceAgreementsMember_cbe4f4ce-08b2-4064-b119-a7c10bb29e63" xlink:href="fnf-20231231.xsd#fnf_IntercompanyReinsuranceAgreementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyTransactionDomain_cd68d7d6-7e5d-450a-bafe-3448aa59b604" xlink:to="loc_fnf_IntercompanyReinsuranceAgreementsMember_cbe4f4ce-08b2-4064-b119-a7c10bb29e63" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_d588050b-bf79-4914-9673-a217b6f56385" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_CededCreditRiskTable_eda7c7a9-05d0-4f09-9f2f-16da3f1015f7" xlink:to="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_d588050b-bf79-4914-9673-a217b6f56385" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_d588050b-bf79-4914-9673-a217b6f56385_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_d588050b-bf79-4914-9673-a217b6f56385" xlink:to="loc_us-gaap_RelatedPartyDomain_d588050b-bf79-4914-9673-a217b6f56385_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RelatedPartyDomain_c7c4503d-e589-4239-a199-792314142096" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RelatedPartyDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_d588050b-bf79-4914-9673-a217b6f56385" xlink:to="loc_us-gaap_RelatedPartyDomain_c7c4503d-e589-4239-a199-792314142096" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_AffiliatedEntityMember_290f7490-a490-4495-9ef3-f60f995e9037" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_AffiliatedEntityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RelatedPartyDomain_c7c4503d-e589-4239-a199-792314142096" xlink:to="loc_srt_AffiliatedEntityMember_290f7490-a490-4495-9ef3-f60f995e9037" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_NumberOfPoliciesReinsuredByForeignCompanyNotEngagedInInsurance_18773f07-d65f-4c7d-af86-be499fb0e3ee" xlink:href="fnf-20231231.xsd#fnf_NumberOfPoliciesReinsuredByForeignCompanyNotEngagedInInsurance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectsOfReinsuranceLineItems_8cb73035-fff3-4fb3-b27b-5f62769cad8d" xlink:to="loc_fnf_NumberOfPoliciesReinsuredByForeignCompanyNotEngagedInInsurance_18773f07-d65f-4c7d-af86-be499fb0e3ee" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_ReinsuranceRiskChargeFee_6ec6abbb-7275-4b86-8982-5ba147e084e6" xlink:href="fnf-20231231.xsd#fnf_ReinsuranceRiskChargeFee"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectsOfReinsuranceLineItems_8cb73035-fff3-4fb3-b27b-5f62769cad8d" xlink:to="loc_fnf_ReinsuranceRiskChargeFee_6ec6abbb-7275-4b86-8982-5ba147e084e6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_RecaptureAndTerminationAgreementLiabilitiesAndObligationsRecapturedPercentage_b1fc30f1-f738-4491-9607-b7e9657f8e1f" xlink:href="fnf-20231231.xsd#fnf_RecaptureAndTerminationAgreementLiabilitiesAndObligationsRecapturedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectsOfReinsuranceLineItems_8cb73035-fff3-4fb3-b27b-5f62769cad8d" xlink:to="loc_fnf_RecaptureAndTerminationAgreementLiabilitiesAndObligationsRecapturedPercentage_b1fc30f1-f738-4491-9607-b7e9657f8e1f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_ae8c10c7-b39c-4793-abf9-c76569308ca2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectsOfReinsuranceLineItems_8cb73035-fff3-4fb3-b27b-5f62769cad8d" xlink:to="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_ae8c10c7-b39c-4793-abf9-c76569308ca2" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_ExcessOfLossAgreementMaximumLossCoverage_0be407c5-7331-40d4-9d5b-3e05d51be537" xlink:href="fnf-20231231.xsd#fnf_ExcessOfLossAgreementMaximumLossCoverage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectsOfReinsuranceLineItems_8cb73035-fff3-4fb3-b27b-5f62769cad8d" xlink:to="loc_fnf_ExcessOfLossAgreementMaximumLossCoverage_0be407c5-7331-40d4-9d5b-3e05d51be537" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/FGReinsuranceSummaryofReinsuranceRecoverableDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#FGReinsuranceSummaryofReinsuranceRecoverableDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/FGReinsuranceSummaryofReinsuranceRecoverableDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectsOfReinsuranceLineItems_e259b629-d761-442d-820e-54d83f2f4677" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EffectsOfReinsuranceLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectsOfReinsuranceTable_199dce62-c950-44b0-a7c2-8b29ade9b512" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EffectsOfReinsuranceTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_EffectsOfReinsuranceLineItems_e259b629-d761-442d-820e-54d83f2f4677" xlink:to="loc_us-gaap_EffectsOfReinsuranceTable_199dce62-c950-44b0-a7c2-8b29ade9b512" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_b4f90500-46a2-4867-9675-221d87034259" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_EffectsOfReinsuranceTable_199dce62-c950-44b0-a7c2-8b29ade9b512" xlink:to="loc_srt_ProductOrServiceAxis_b4f90500-46a2-4867-9675-221d87034259" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_b4f90500-46a2-4867-9675-221d87034259_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_b4f90500-46a2-4867-9675-221d87034259" xlink:to="loc_srt_ProductsAndServicesDomain_b4f90500-46a2-4867-9675-221d87034259_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_ac06e7d4-a3c1-4649-93cc-1b4dd9aed143" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_b4f90500-46a2-4867-9675-221d87034259" xlink:to="loc_srt_ProductsAndServicesDomain_ac06e7d4-a3c1-4649-93cc-1b4dd9aed143" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_CertainMYGAMember_1980a6a2-d5d5-42d5-b5e8-5a9b32deca56" xlink:href="fnf-20231231.xsd#fnf_CertainMYGAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_ac06e7d4-a3c1-4649-93cc-1b4dd9aed143" xlink:to="loc_fnf_CertainMYGAMember_1980a6a2-d5d5-42d5-b5e8-5a9b32deca56" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_BlockOfTraditionalIULAndULMember_0c5ca810-ef9a-4152-8c52-256ebdf2d01e" xlink:href="fnf-20231231.xsd#fnf_BlockOfTraditionalIULAndULMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_ac06e7d4-a3c1-4649-93cc-1b4dd9aed143" xlink:to="loc_fnf_BlockOfTraditionalIULAndULMember_0c5ca810-ef9a-4152-8c52-256ebdf2d01e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_CertainMYGAAndDAMember_4f3fa222-8994-4fbb-8125-e3d06f409b9e" xlink:href="fnf-20231231.xsd#fnf_CertainMYGAAndDAMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_ac06e7d4-a3c1-4649-93cc-1b4dd9aed143" xlink:to="loc_fnf_CertainMYGAAndDAMember_4f3fa222-8994-4fbb-8125-e3d06f409b9e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CededCreditRiskAxis_afa1aad0-7bac-4736-b565-dc1186ac8d6c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CededCreditRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_EffectsOfReinsuranceTable_199dce62-c950-44b0-a7c2-8b29ade9b512" xlink:to="loc_us-gaap_CededCreditRiskAxis_afa1aad0-7bac-4736-b565-dc1186ac8d6c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CededCreditRiskReinsurerDomain_afa1aad0-7bac-4736-b565-dc1186ac8d6c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CededCreditRiskReinsurerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CededCreditRiskAxis_afa1aad0-7bac-4736-b565-dc1186ac8d6c" xlink:to="loc_us-gaap_CededCreditRiskReinsurerDomain_afa1aad0-7bac-4736-b565-dc1186ac8d6c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CededCreditRiskReinsurerDomain_45f6209d-e693-47a0-b901-3f7b224b4749" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CededCreditRiskReinsurerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CededCreditRiskAxis_afa1aad0-7bac-4736-b565-dc1186ac8d6c" xlink:to="loc_us-gaap_CededCreditRiskReinsurerDomain_45f6209d-e693-47a0-b901-3f7b224b4749" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_AspidaReMember_65a05af4-91b2-4817-b5c1-41071c078135" xlink:href="fnf-20231231.xsd#fnf_AspidaReMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CededCreditRiskReinsurerDomain_45f6209d-e693-47a0-b901-3f7b224b4749" xlink:to="loc_fnf_AspidaReMember_65a05af4-91b2-4817-b5c1-41071c078135" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_WiltonReassuranceCompanyMember_6e30ecfd-beeb-4954-be34-b0537742c7d9" xlink:href="fnf-20231231.xsd#fnf_WiltonReassuranceCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CededCreditRiskReinsurerDomain_45f6209d-e693-47a0-b901-3f7b224b4749" xlink:to="loc_fnf_WiltonReassuranceCompanyMember_6e30ecfd-beeb-4954-be34-b0537742c7d9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_SomersetMember_dd7055ce-2bea-41f1-a2f4-0f579557b937" xlink:href="fnf-20231231.xsd#fnf_SomersetMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CededCreditRiskReinsurerDomain_45f6209d-e693-47a0-b901-3f7b224b4749" xlink:to="loc_fnf_SomersetMember_dd7055ce-2bea-41f1-a2f4-0f579557b937" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_EverlakeLifeInsuranceCompanyMember_76cb87e4-4e26-4180-b5de-8f6192cb31c5" xlink:href="fnf-20231231.xsd#fnf_EverlakeLifeInsuranceCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CededCreditRiskReinsurerDomain_45f6209d-e693-47a0-b901-3f7b224b4749" xlink:to="loc_fnf_EverlakeLifeInsuranceCompanyMember_76cb87e4-4e26-4180-b5de-8f6192cb31c5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherReinsurerMember_390ee6db-82fa-476b-9275-821da5eb3825" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherReinsurerMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CededCreditRiskReinsurerDomain_45f6209d-e693-47a0-b901-3f7b224b4749" xlink:to="loc_us-gaap_OtherReinsurerMember_390ee6db-82fa-476b-9275-821da5eb3825" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_ac65dced-9d82-49e8-8456-2ae958ad331c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_EffectsOfReinsuranceTable_199dce62-c950-44b0-a7c2-8b29ade9b512" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_ac65dced-9d82-49e8-8456-2ae958ad331c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_ac65dced-9d82-49e8-8456-2ae958ad331c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_ac65dced-9d82-49e8-8456-2ae958ad331c" xlink:to="loc_us-gaap_SegmentDomain_ac65dced-9d82-49e8-8456-2ae958ad331c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_548ea17a-5d12-4cb4-8ea4-e8dedaebb644" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_ac65dced-9d82-49e8-8456-2ae958ad331c" xlink:to="loc_us-gaap_SegmentDomain_548ea17a-5d12-4cb4-8ea4-e8dedaebb644" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FGSegmentMember_c20ef183-8af6-4b96-a731-b345396ff6a6" xlink:href="fnf-20231231.xsd#fnf_FGSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_548ea17a-5d12-4cb4-8ea4-e8dedaebb644" xlink:to="loc_fnf_FGSegmentMember_c20ef183-8af6-4b96-a731-b345396ff6a6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReinsuranceRecoverablesGross_8258e973-e3e3-423c-9053-1046b7142dc9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ReinsuranceRecoverablesGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectsOfReinsuranceLineItems_e259b629-d761-442d-820e-54d83f2f4677" xlink:to="loc_us-gaap_ReinsuranceRecoverablesGross_8258e973-e3e3-423c-9053-1046b7142dc9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReinsuranceRecoverablesAllowance_0cdb6eb5-a1e1-48fe-86fd-b97c10d1542e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ReinsuranceRecoverablesAllowance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectsOfReinsuranceLineItems_e259b629-d761-442d-820e-54d83f2f4677" xlink:to="loc_us-gaap_ReinsuranceRecoverablesAllowance_0cdb6eb5-a1e1-48fe-86fd-b97c10d1542e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReinsuranceRecoverables_c9fc6cd2-c963-49fc-9c32-4b1faf7de40f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ReinsuranceRecoverables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectsOfReinsuranceLineItems_e259b629-d761-442d-820e-54d83f2f4677" xlink:to="loc_us-gaap_ReinsuranceRecoverables_c9fc6cd2-c963-49fc-9c32-4b1faf7de40f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_ReinsuranceRetrocessionQuotaShareBasisPercentage_1f554f21-a1a1-4742-b014-0c7c7cac8ff7" xlink:href="fnf-20231231.xsd#fnf_ReinsuranceRetrocessionQuotaShareBasisPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EffectsOfReinsuranceLineItems_e259b629-d761-442d-820e-54d83f2f4677" xlink:to="loc_fnf_ReinsuranceRetrocessionQuotaShareBasisPercentage_1f554f21-a1a1-4742-b014-0c7c7cac8ff7" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/RegulationandEquityNarrativeDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#RegulationandEquityNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/RegulationandEquityNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatutoryAccountingPracticesLineItems_d95a5590-9932-4a71-9511-91be8ed86502" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatutoryAccountingPracticesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatutoryAccountingPracticesTable_c0666b6a-4244-4288-adda-ac4bd555fd32" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatutoryAccountingPracticesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatutoryAccountingPracticesLineItems_d95a5590-9932-4a71-9511-91be8ed86502" xlink:to="loc_us-gaap_StatutoryAccountingPracticesTable_c0666b6a-4244-4288-adda-ac4bd555fd32" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementScenarioAxis_8268f026-fd99-4fe8-9dc0-5c40e435e417" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_StatementScenarioAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatutoryAccountingPracticesTable_c0666b6a-4244-4288-adda-ac4bd555fd32" xlink:to="loc_srt_StatementScenarioAxis_8268f026-fd99-4fe8-9dc0-5c40e435e417" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_8268f026-fd99-4fe8-9dc0-5c40e435e417_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementScenarioAxis_8268f026-fd99-4fe8-9dc0-5c40e435e417" xlink:to="loc_srt_ScenarioUnspecifiedDomain_8268f026-fd99-4fe8-9dc0-5c40e435e417_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioUnspecifiedDomain_825ec998-2d17-457f-b3cc-603f5684bf3f" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ScenarioUnspecifiedDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementScenarioAxis_8268f026-fd99-4fe8-9dc0-5c40e435e417" xlink:to="loc_srt_ScenarioUnspecifiedDomain_825ec998-2d17-457f-b3cc-603f5684bf3f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioForecastMember_ca822065-068e-45ec-b91e-ea6d1a13664c" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ScenarioForecastMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ScenarioUnspecifiedDomain_825ec998-2d17-457f-b3cc-603f5684bf3f" xlink:to="loc_srt_ScenarioForecastMember_ca822065-068e-45ec-b91e-ea6d1a13664c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatutoryAccountingPracticesByJurisdictionAxis_b0b034ea-9fec-4786-b81e-bd079be9290c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatutoryAccountingPracticesByJurisdictionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatutoryAccountingPracticesTable_c0666b6a-4244-4288-adda-ac4bd555fd32" xlink:to="loc_us-gaap_StatutoryAccountingPracticesByJurisdictionAxis_b0b034ea-9fec-4786-b81e-bd079be9290c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatutoryAccountingPracticesJurisdictionDomain_b0b034ea-9fec-4786-b81e-bd079be9290c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatutoryAccountingPracticesJurisdictionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatutoryAccountingPracticesByJurisdictionAxis_b0b034ea-9fec-4786-b81e-bd079be9290c" xlink:to="loc_us-gaap_StatutoryAccountingPracticesJurisdictionDomain_b0b034ea-9fec-4786-b81e-bd079be9290c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatutoryAccountingPracticesJurisdictionDomain_739f8618-3e97-4763-a8b3-8e6a6f344c69" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatutoryAccountingPracticesJurisdictionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatutoryAccountingPracticesByJurisdictionAxis_b0b034ea-9fec-4786-b81e-bd079be9290c" xlink:to="loc_us-gaap_StatutoryAccountingPracticesJurisdictionDomain_739f8618-3e97-4763-a8b3-8e6a6f344c69" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_stpr_IA_32aff0ea-63d4-4ef4-9a94-54851b045ada" xlink:href="https://xbrl.sec.gov/stpr/2023/stpr-2023.xsd#stpr_IA"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatutoryAccountingPracticesJurisdictionDomain_739f8618-3e97-4763-a8b3-8e6a6f344c69" xlink:to="loc_stpr_IA_32aff0ea-63d4-4ef4-9a94-54851b045ada" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_stpr_VT_97014540-81b1-4379-8ccb-c61b134e7871" xlink:href="https://xbrl.sec.gov/stpr/2023/stpr-2023.xsd#stpr_VT"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatutoryAccountingPracticesJurisdictionDomain_739f8618-3e97-4763-a8b3-8e6a6f344c69" xlink:to="loc_stpr_VT_97014540-81b1-4379-8ccb-c61b134e7871" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_stpr_NY_61c17231-c8a0-488d-b2b7-e80602ff289f" xlink:href="https://xbrl.sec.gov/stpr/2023/stpr-2023.xsd#stpr_NY"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatutoryAccountingPracticesJurisdictionDomain_739f8618-3e97-4763-a8b3-8e6a6f344c69" xlink:to="loc_stpr_NY_61c17231-c8a0-488d-b2b7-e80602ff289f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LegalEntityAxis_456d6729-b038-4bec-babe-63085e3f44fb" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_LegalEntityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatutoryAccountingPracticesTable_c0666b6a-4244-4288-adda-ac4bd555fd32" xlink:to="loc_dei_LegalEntityAxis_456d6729-b038-4bec-babe-63085e3f44fb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_456d6729-b038-4bec-babe-63085e3f44fb_default" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_dei_LegalEntityAxis_456d6729-b038-4bec-babe-63085e3f44fb" xlink:to="loc_dei_EntityDomain_456d6729-b038-4bec-babe-63085e3f44fb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain_bfea9d25-896c-40f9-8113-05b85637062d" xlink:href="https://xbrl.sec.gov/dei/2023/dei-2023.xsd#dei_EntityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_dei_LegalEntityAxis_456d6729-b038-4bec-babe-63085e3f44fb" xlink:to="loc_dei_EntityDomain_bfea9d25-896c-40f9-8113-05b85637062d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_RavenReinsuranceCompanyMember_2bc483b7-8706-4df2-b661-5be88932629f" xlink:href="fnf-20231231.xsd#fnf_RavenReinsuranceCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain_bfea9d25-896c-40f9-8113-05b85637062d" xlink:to="loc_fnf_RavenReinsuranceCompanyMember_2bc483b7-8706-4df2-b661-5be88932629f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CededCreditRiskAxis_089fb6fc-9423-4248-ac20-d9739ec77450" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CededCreditRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatutoryAccountingPracticesTable_c0666b6a-4244-4288-adda-ac4bd555fd32" xlink:to="loc_us-gaap_CededCreditRiskAxis_089fb6fc-9423-4248-ac20-d9739ec77450" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CededCreditRiskReinsurerDomain_089fb6fc-9423-4248-ac20-d9739ec77450_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CededCreditRiskReinsurerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CededCreditRiskAxis_089fb6fc-9423-4248-ac20-d9739ec77450" xlink:to="loc_us-gaap_CededCreditRiskReinsurerDomain_089fb6fc-9423-4248-ac20-d9739ec77450_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CededCreditRiskReinsurerDomain_e1d4efd4-86ec-436d-a2d5-6bff2fd23d2c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CededCreditRiskReinsurerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CededCreditRiskAxis_089fb6fc-9423-4248-ac20-d9739ec77450" xlink:to="loc_us-gaap_CededCreditRiskReinsurerDomain_e1d4efd4-86ec-436d-a2d5-6bff2fd23d2c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_CorbeauReMember_4c3d280e-0cf3-4c08-b37f-8fe2e967636d" xlink:href="fnf-20231231.xsd#fnf_CorbeauReMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CededCreditRiskReinsurerDomain_e1d4efd4-86ec-436d-a2d5-6bff2fd23d2c" xlink:to="loc_fnf_CorbeauReMember_4c3d280e-0cf3-4c08-b37f-8fe2e967636d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_RavenReinsuranceCompanyMember_4c0442e3-b933-4347-9407-b11acdd2ba71" xlink:href="fnf-20231231.xsd#fnf_RavenReinsuranceCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CededCreditRiskReinsurerDomain_e1d4efd4-86ec-436d-a2d5-6bff2fd23d2c" xlink:to="loc_fnf_RavenReinsuranceCompanyMember_4c0442e3-b933-4347-9407-b11acdd2ba71" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_StatutoryAccountingPracticesPermittedPracticeChangeinStatutoryCapitalandSurplus_02e2cba1-93d9-4d5c-987b-86595da20bef" xlink:href="fnf-20231231.xsd#fnf_StatutoryAccountingPracticesPermittedPracticeChangeinStatutoryCapitalandSurplus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatutoryAccountingPracticesLineItems_d95a5590-9932-4a71-9511-91be8ed86502" xlink:to="loc_fnf_StatutoryAccountingPracticesPermittedPracticeChangeinStatutoryCapitalandSurplus_02e2cba1-93d9-4d5c-987b-86595da20bef" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_StatutoryAccountingPracticesCombinedUnearnedPremiumReserveRequired_c547346c-5291-4bc8-92b3-8f0f49920889" xlink:href="fnf-20231231.xsd#fnf_StatutoryAccountingPracticesCombinedUnearnedPremiumReserveRequired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatutoryAccountingPracticesLineItems_d95a5590-9932-4a71-9511-91be8ed86502" xlink:to="loc_fnf_StatutoryAccountingPracticesCombinedUnearnedPremiumReserveRequired_c547346c-5291-4bc8-92b3-8f0f49920889" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatutoryAccountingPracticesRetainedEarningsNotAvailableForDividends_a959285e-45f5-4cb7-bd1c-e709af545a23" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatutoryAccountingPracticesRetainedEarningsNotAvailableForDividends"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatutoryAccountingPracticesLineItems_d95a5590-9932-4a71-9511-91be8ed86502" xlink:to="loc_us-gaap_StatutoryAccountingPracticesRetainedEarningsNotAvailableForDividends_a959285e-45f5-4cb7-bd1c-e709af545a23" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPaymentsWithoutRegulatoryApproval_2e84ca04-4dc0-4eb5-8f70-1df2e023d783" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPaymentsWithoutRegulatoryApproval"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatutoryAccountingPracticesLineItems_d95a5590-9932-4a71-9511-91be8ed86502" xlink:to="loc_us-gaap_StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPaymentsWithoutRegulatoryApproval_2e84ca04-4dc0-4eb5-8f70-1df2e023d783" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatutoryAccountingPracticesStatutoryCapitalAndSurplusBalance_1e81e584-f5f2-4f9f-82f0-75c4521c7bb7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatutoryAccountingPracticesStatutoryCapitalAndSurplusBalance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatutoryAccountingPracticesLineItems_d95a5590-9932-4a71-9511-91be8ed86502" xlink:to="loc_us-gaap_StatutoryAccountingPracticesStatutoryCapitalAndSurplusBalance_1e81e584-f5f2-4f9f-82f0-75c4521c7bb7" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatutoryAccountingPracticesStatutoryNetIncomeAmount_0dc276ca-6e2a-4843-9cb7-3062f844a468" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatutoryAccountingPracticesStatutoryNetIncomeAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatutoryAccountingPracticesLineItems_d95a5590-9932-4a71-9511-91be8ed86502" xlink:to="loc_us-gaap_StatutoryAccountingPracticesStatutoryNetIncomeAmount_0dc276ca-6e2a-4843-9cb7-3062f844a468" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MinimumNetWorthRequiredForCompliance_1dbc730c-4c6e-4d18-8672-45ac72d3d2d3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MinimumNetWorthRequiredForCompliance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatutoryAccountingPracticesLineItems_d95a5590-9932-4a71-9511-91be8ed86502" xlink:to="loc_us-gaap_MinimumNetWorthRequiredForCompliance_1dbc730c-4c6e-4d18-8672-45ac72d3d2d3" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatutoryAccountingPracticesDividendsPaidWithApprovalOfRegulatoryAgency_aca1f830-72d6-45de-a472-31052e9c0121" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatutoryAccountingPracticesDividendsPaidWithApprovalOfRegulatoryAgency"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatutoryAccountingPracticesLineItems_d95a5590-9932-4a71-9511-91be8ed86502" xlink:to="loc_us-gaap_StatutoryAccountingPracticesDividendsPaidWithApprovalOfRegulatoryAgency_aca1f830-72d6-45de-a472-31052e9c0121" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_StatutoryAccountingPracticesStatutoryCapitalandSurplusIncreaseDecreaseasaResultofReDomesticationbyEntity_06577640-8437-46aa-a352-6d95ce4f7a74" xlink:href="fnf-20231231.xsd#fnf_StatutoryAccountingPracticesStatutoryCapitalandSurplusIncreaseDecreaseasaResultofReDomesticationbyEntity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatutoryAccountingPracticesLineItems_d95a5590-9932-4a71-9511-91be8ed86502" xlink:to="loc_fnf_StatutoryAccountingPracticesStatutoryCapitalandSurplusIncreaseDecreaseasaResultofReDomesticationbyEntity_06577640-8437-46aa-a352-6d95ce4f7a74" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_StatutoryAccountingPracticesNonPermittedPracticeChangeinStatutoryCapitalandSurplus_a632a432-2d0d-475b-81e6-8d0010a85908" xlink:href="fnf-20231231.xsd#fnf_StatutoryAccountingPracticesNonPermittedPracticeChangeinStatutoryCapitalandSurplus"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatutoryAccountingPracticesLineItems_d95a5590-9932-4a71-9511-91be8ed86502" xlink:to="loc_fnf_StatutoryAccountingPracticesNonPermittedPracticeChangeinStatutoryCapitalandSurplus_a632a432-2d0d-475b-81e6-8d0010a85908" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_StatutoryAccountingPracticesStatutoryCapitalAndSurplusDeficitBalance_a9eb15d5-9542-4c10-85f4-e95db689b418" xlink:href="fnf-20231231.xsd#fnf_StatutoryAccountingPracticesStatutoryCapitalAndSurplusDeficitBalance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatutoryAccountingPracticesLineItems_d95a5590-9932-4a71-9511-91be8ed86502" xlink:to="loc_fnf_StatutoryAccountingPracticesStatutoryCapitalAndSurplusDeficitBalance_a9eb15d5-9542-4c10-85f4-e95db689b418" xlink:type="arc" order="10"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/RegulationandEquityStatutoryIncomeandNetCapitalDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#RegulationandEquityStatutoryIncomeandNetCapitalDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/RegulationandEquityStatutoryIncomeandNetCapitalDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatutoryAccountingPracticesLineItems_975d31ed-139f-439a-b22a-1856ecaaf87c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatutoryAccountingPracticesLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatutoryAccountingPracticesTable_95fa2725-494d-4924-81be-44aa44cd4212" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatutoryAccountingPracticesTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_StatutoryAccountingPracticesLineItems_975d31ed-139f-439a-b22a-1856ecaaf87c" xlink:to="loc_us-gaap_StatutoryAccountingPracticesTable_95fa2725-494d-4924-81be-44aa44cd4212" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatutoryAccountingPracticesByJurisdictionAxis_ac6e6b36-4916-402b-90c3-45f0d6b214e3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatutoryAccountingPracticesByJurisdictionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatutoryAccountingPracticesTable_95fa2725-494d-4924-81be-44aa44cd4212" xlink:to="loc_us-gaap_StatutoryAccountingPracticesByJurisdictionAxis_ac6e6b36-4916-402b-90c3-45f0d6b214e3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatutoryAccountingPracticesJurisdictionDomain_ac6e6b36-4916-402b-90c3-45f0d6b214e3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatutoryAccountingPracticesJurisdictionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatutoryAccountingPracticesByJurisdictionAxis_ac6e6b36-4916-402b-90c3-45f0d6b214e3" xlink:to="loc_us-gaap_StatutoryAccountingPracticesJurisdictionDomain_ac6e6b36-4916-402b-90c3-45f0d6b214e3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatutoryAccountingPracticesJurisdictionDomain_c89d6e13-8056-4249-b838-687bdb610190" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatutoryAccountingPracticesJurisdictionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatutoryAccountingPracticesByJurisdictionAxis_ac6e6b36-4916-402b-90c3-45f0d6b214e3" xlink:to="loc_us-gaap_StatutoryAccountingPracticesJurisdictionDomain_c89d6e13-8056-4249-b838-687bdb610190" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_stpr_IA_63cf0a7c-11f9-46fa-ad5a-3907552af994" xlink:href="https://xbrl.sec.gov/stpr/2023/stpr-2023.xsd#stpr_IA"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatutoryAccountingPracticesJurisdictionDomain_c89d6e13-8056-4249-b838-687bdb610190" xlink:to="loc_stpr_IA_63cf0a7c-11f9-46fa-ad5a-3907552af994" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_stpr_NY_f8a59e32-443d-4a0d-a6f5-9a66b427e1cc" xlink:href="https://xbrl.sec.gov/stpr/2023/stpr-2023.xsd#stpr_NY"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatutoryAccountingPracticesJurisdictionDomain_c89d6e13-8056-4249-b838-687bdb610190" xlink:to="loc_stpr_NY_f8a59e32-443d-4a0d-a6f5-9a66b427e1cc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_stpr_VT_be1382e4-7948-453c-9d52-0d6917d6ca8a" xlink:href="https://xbrl.sec.gov/stpr/2023/stpr-2023.xsd#stpr_VT"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatutoryAccountingPracticesJurisdictionDomain_c89d6e13-8056-4249-b838-687bdb610190" xlink:to="loc_stpr_VT_be1382e4-7948-453c-9d52-0d6917d6ca8a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_KY_dcde3414-30e3-4c1f-9d59-a46f45ad65a4" xlink:href="https://xbrl.sec.gov/country/2023/country-2023.xsd#country_KY"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatutoryAccountingPracticesJurisdictionDomain_c89d6e13-8056-4249-b838-687bdb610190" xlink:to="loc_country_KY_dcde3414-30e3-4c1f-9d59-a46f45ad65a4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_country_BM_e4541a10-8e98-4035-8e7c-2aa1e52eb933" xlink:href="https://xbrl.sec.gov/country/2023/country-2023.xsd#country_BM"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatutoryAccountingPracticesJurisdictionDomain_c89d6e13-8056-4249-b838-687bdb610190" xlink:to="loc_country_BM_e4541a10-8e98-4035-8e7c-2aa1e52eb933" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_cddbdbd4-170a-425b-8c7f-92f66be6df2a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatutoryAccountingPracticesTable_95fa2725-494d-4924-81be-44aa44cd4212" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_cddbdbd4-170a-425b-8c7f-92f66be6df2a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_cddbdbd4-170a-425b-8c7f-92f66be6df2a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_cddbdbd4-170a-425b-8c7f-92f66be6df2a" xlink:to="loc_us-gaap_SegmentDomain_cddbdbd4-170a-425b-8c7f-92f66be6df2a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_be267772-7c3b-4df0-bc73-1058d7266523" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_cddbdbd4-170a-425b-8c7f-92f66be6df2a" xlink:to="loc_us-gaap_SegmentDomain_be267772-7c3b-4df0-bc73-1058d7266523" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FGSegmentMember_c1949ef5-a35b-4517-a47f-f63895bf3651" xlink:href="fnf-20231231.xsd#fnf_FGSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_be267772-7c3b-4df0-bc73-1058d7266523" xlink:to="loc_fnf_FGSegmentMember_c1949ef5-a35b-4517-a47f-f63895bf3651" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CededCreditRiskAxis_85bf5b8b-038e-4ea0-b180-39ab273a86c3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CededCreditRiskAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_StatutoryAccountingPracticesTable_95fa2725-494d-4924-81be-44aa44cd4212" xlink:to="loc_us-gaap_CededCreditRiskAxis_85bf5b8b-038e-4ea0-b180-39ab273a86c3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CededCreditRiskReinsurerDomain_85bf5b8b-038e-4ea0-b180-39ab273a86c3_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CededCreditRiskReinsurerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CededCreditRiskAxis_85bf5b8b-038e-4ea0-b180-39ab273a86c3" xlink:to="loc_us-gaap_CededCreditRiskReinsurerDomain_85bf5b8b-038e-4ea0-b180-39ab273a86c3_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CededCreditRiskReinsurerDomain_5c4dca29-8d00-4ba9-883e-28b7fde13280" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CededCreditRiskReinsurerDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CededCreditRiskAxis_85bf5b8b-038e-4ea0-b180-39ab273a86c3" xlink:to="loc_us-gaap_CededCreditRiskReinsurerDomain_5c4dca29-8d00-4ba9-883e-28b7fde13280" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_RavenReinsuranceCompanyMember_6933200b-b9ac-427a-964a-54c3fc7f4d38" xlink:href="fnf-20231231.xsd#fnf_RavenReinsuranceCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CededCreditRiskReinsurerDomain_5c4dca29-8d00-4ba9-883e-28b7fde13280" xlink:to="loc_fnf_RavenReinsuranceCompanyMember_6933200b-b9ac-427a-964a-54c3fc7f4d38" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_CorbeauReMember_c5cc422b-611d-4fae-a7e9-c4880ded3414" xlink:href="fnf-20231231.xsd#fnf_CorbeauReMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CededCreditRiskReinsurerDomain_5c4dca29-8d00-4ba9-883e-28b7fde13280" xlink:to="loc_fnf_CorbeauReMember_c5cc422b-611d-4fae-a7e9-c4880ded3414" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_StatutoryAccountingPracticesStatutoryNetIncomeLossAmount_ea6ce868-37fd-4ec5-83b8-a7f99e0b950c" xlink:href="fnf-20231231.xsd#fnf_StatutoryAccountingPracticesStatutoryNetIncomeLossAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatutoryAccountingPracticesLineItems_975d31ed-139f-439a-b22a-1856ecaaf87c" xlink:to="loc_fnf_StatutoryAccountingPracticesStatutoryNetIncomeLossAmount_ea6ce868-37fd-4ec5-83b8-a7f99e0b950c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_StatutoryAccountingPracticesStatutoryCapitalAndSurplusDeficitBalance_e480b3ef-700c-4b17-a3e1-382a6b1ef108" xlink:href="fnf-20231231.xsd#fnf_StatutoryAccountingPracticesStatutoryCapitalAndSurplusDeficitBalance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_StatutoryAccountingPracticesLineItems_975d31ed-139f-439a-b22a-1856ecaaf87c" xlink:to="loc_fnf_StatutoryAccountingPracticesStatutoryCapitalAndSurplusDeficitBalance_e480b3ef-700c-4b17-a3e1-382a6b1ef108" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/RegulationandEquityEquityDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#RegulationandEquityEquityDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/RegulationandEquityEquityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockLineItems_9845bc92-ad8e-4251-b96f-af1c06c9e4d1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ClassOfStockLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfStockByClassTable_92eeb6a9-72dd-4401-aad9-3c9fba92c318" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfStockByClassTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ClassOfStockLineItems_9845bc92-ad8e-4251-b96f-af1c06c9e4d1" xlink:to="loc_us-gaap_ScheduleOfStockByClassTable_92eeb6a9-72dd-4401-aad9-3c9fba92c318" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_4412f921-2b1c-4536-8f16-1441783f790d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_92eeb6a9-72dd-4401-aad9-3c9fba92c318" xlink:to="loc_us-gaap_StatementClassOfStockAxis_4412f921-2b1c-4536-8f16-1441783f790d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_4412f921-2b1c-4536-8f16-1441783f790d_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_4412f921-2b1c-4536-8f16-1441783f790d" xlink:to="loc_us-gaap_ClassOfStockDomain_4412f921-2b1c-4536-8f16-1441783f790d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_31469286-bf8d-4d09-934a-f4ad9c9f0324" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_4412f921-2b1c-4536-8f16-1441783f790d" xlink:to="loc_us-gaap_ClassOfStockDomain_31469286-bf8d-4d09-934a-f4ad9c9f0324" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FidelityNationalFinancialGroupCommonStockMember_b98a5d63-0824-4efc-bea4-7a913d63f80f" xlink:href="fnf-20231231.xsd#fnf_FidelityNationalFinancialGroupCommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_31469286-bf8d-4d09-934a-f4ad9c9f0324" xlink:to="loc_fnf_FidelityNationalFinancialGroupCommonStockMember_b98a5d63-0824-4efc-bea4-7a913d63f80f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareRepurchaseProgramAxis_ace34ad2-b379-4b84-9aad-92c3ea3eac47" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareRepurchaseProgramAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfStockByClassTable_92eeb6a9-72dd-4401-aad9-3c9fba92c318" xlink:to="loc_us-gaap_ShareRepurchaseProgramAxis_ace34ad2-b379-4b84-9aad-92c3ea3eac47" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareRepurchaseProgramDomain_ace34ad2-b379-4b84-9aad-92c3ea3eac47_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareRepurchaseProgramDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ShareRepurchaseProgramAxis_ace34ad2-b379-4b84-9aad-92c3ea3eac47" xlink:to="loc_us-gaap_ShareRepurchaseProgramDomain_ace34ad2-b379-4b84-9aad-92c3ea3eac47_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareRepurchaseProgramDomain_156b2bcf-8c99-4bd5-b2ba-c2449b5ed790" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareRepurchaseProgramDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ShareRepurchaseProgramAxis_ace34ad2-b379-4b84-9aad-92c3ea3eac47" xlink:to="loc_us-gaap_ShareRepurchaseProgramDomain_156b2bcf-8c99-4bd5-b2ba-c2449b5ed790" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_ShareRepurchaseProgramMember_f660e897-656c-4528-98ef-80b5401ab12c" xlink:href="fnf-20231231.xsd#fnf_ShareRepurchaseProgramMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareRepurchaseProgramDomain_156b2bcf-8c99-4bd5-b2ba-c2449b5ed790" xlink:to="loc_fnf_ShareRepurchaseProgramMember_f660e897-656c-4528-98ef-80b5401ab12c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased_51dc6f08-7ac0-4dbd-84e9-7a937ba0f9ca" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_9845bc92-ad8e-4251-b96f-af1c06c9e4d1" xlink:to="loc_us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased_51dc6f08-7ac0-4dbd-84e9-7a937ba0f9ca" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockSharesAcquired_f4c6bf2e-d318-4cc8-a20e-ac8fc61c4e4e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TreasuryStockSharesAcquired"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_9845bc92-ad8e-4251-b96f-af1c06c9e4d1" xlink:to="loc_us-gaap_TreasuryStockSharesAcquired_f4c6bf2e-d318-4cc8-a20e-ac8fc61c4e4e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_0186db03-9bfb-4330-ba2e-6643d604e189" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TreasuryStockValueAcquiredCostMethod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_9845bc92-ad8e-4251-b96f-af1c06c9e4d1" xlink:to="loc_us-gaap_TreasuryStockValueAcquiredCostMethod_0186db03-9bfb-4330-ba2e-6643d604e189" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockAcquiredAverageCostPerShare_b0ba00f4-9486-45f1-8c67-6c77ce2102dd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TreasuryStockAcquiredAverageCostPerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockLineItems_9845bc92-ad8e-4251-b96f-af1c06c9e4d1" xlink:to="loc_us-gaap_TreasuryStockAcquiredAverageCostPerShare_b0ba00f4-9486-45f1-8c67-6c77ce2102dd" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/LeasesNarrativeDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#LeasesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/LeasesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_7cf97ac0-be75-4a32-938c-e5bd5ab23ca9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_97dc9c90-83a1-4426-81a8-6a92402b04bd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7cf97ac0-be75-4a32-938c-e5bd5ab23ca9" xlink:to="loc_us-gaap_DebtInstrumentTable_97dc9c90-83a1-4426-81a8-6a92402b04bd" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_7d61c8bf-fe63-43f1-be31-d9ec799a3eed" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_97dc9c90-83a1-4426-81a8-6a92402b04bd" xlink:to="loc_srt_RangeAxis_7d61c8bf-fe63-43f1-be31-d9ec799a3eed" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_7d61c8bf-fe63-43f1-be31-d9ec799a3eed_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_7d61c8bf-fe63-43f1-be31-d9ec799a3eed" xlink:to="loc_srt_RangeMember_7d61c8bf-fe63-43f1-be31-d9ec799a3eed_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_6a1ee17d-ff41-459a-b6df-2ea4a743fc21" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_7d61c8bf-fe63-43f1-be31-d9ec799a3eed" xlink:to="loc_srt_RangeMember_6a1ee17d-ff41-459a-b6df-2ea4a743fc21" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_dbbbc1e5-1706-46f3-b71c-3f2916307cb5" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_6a1ee17d-ff41-459a-b6df-2ea4a743fc21" xlink:to="loc_srt_MinimumMember_dbbbc1e5-1706-46f3-b71c-3f2916307cb5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_76a04809-b363-4110-af3b-f194d5c2cb86" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_6a1ee17d-ff41-459a-b6df-2ea4a743fc21" xlink:to="loc_srt_MaximumMember_76a04809-b363-4110-af3b-f194d5c2cb86" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateAxis_9ffaa5d6-8741-4ed0-b042-486da7cb5a9c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_VariableRateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_97dc9c90-83a1-4426-81a8-6a92402b04bd" xlink:to="loc_us-gaap_VariableRateAxis_9ffaa5d6-8741-4ed0-b042-486da7cb5a9c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_9ffaa5d6-8741-4ed0-b042-486da7cb5a9c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_VariableRateAxis_9ffaa5d6-8741-4ed0-b042-486da7cb5a9c" xlink:to="loc_us-gaap_VariableRateDomain_9ffaa5d6-8741-4ed0-b042-486da7cb5a9c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_VariableRateDomain_4697b2e9-47b7-4a38-b216-cdb708eb1398" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_VariableRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_VariableRateAxis_9ffaa5d6-8741-4ed0-b042-486da7cb5a9c" xlink:to="loc_us-gaap_VariableRateDomain_4697b2e9-47b7-4a38-b216-cdb708eb1398" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_LondonInterbankOfferedRateLIBOR1Member_003f9909-7b1b-45d6-9189-c21be8bbd7a7" xlink:href="fnf-20231231.xsd#fnf_LondonInterbankOfferedRateLIBOR1Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_VariableRateDomain_4697b2e9-47b7-4a38-b216-cdb708eb1398" xlink:to="loc_fnf_LondonInterbankOfferedRateLIBOR1Member_003f9909-7b1b-45d6-9189-c21be8bbd7a7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_c5c2fba9-51bf-40bc-b44d-73daecd122e7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_97dc9c90-83a1-4426-81a8-6a92402b04bd" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_c5c2fba9-51bf-40bc-b44d-73daecd122e7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_c5c2fba9-51bf-40bc-b44d-73daecd122e7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_c5c2fba9-51bf-40bc-b44d-73daecd122e7" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_c5c2fba9-51bf-40bc-b44d-73daecd122e7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_266f93a7-52d4-47bc-a351-995ac9a1547c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_c5c2fba9-51bf-40bc-b44d-73daecd122e7" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_266f93a7-52d4-47bc-a351-995ac9a1547c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_d68155d1-501e-43b1-bc32-fe8e79da3ec7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_266f93a7-52d4-47bc-a351-995ac9a1547c" xlink:to="loc_us-gaap_LineOfCreditMember_d68155d1-501e-43b1-bc32-fe8e79da3ec7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_a62a2d1e-2033-46f0-8529-875c5fb8ae37" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_97dc9c90-83a1-4426-81a8-6a92402b04bd" xlink:to="loc_us-gaap_CreditFacilityAxis_a62a2d1e-2033-46f0-8529-875c5fb8ae37" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_a62a2d1e-2033-46f0-8529-875c5fb8ae37_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_a62a2d1e-2033-46f0-8529-875c5fb8ae37" xlink:to="loc_us-gaap_CreditFacilityDomain_a62a2d1e-2033-46f0-8529-875c5fb8ae37_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_c8537c0d-1c3e-457b-ab35-c0bbc1bf9353" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_a62a2d1e-2033-46f0-8529-875c5fb8ae37" xlink:to="loc_us-gaap_CreditFacilityDomain_c8537c0d-1c3e-457b-ab35-c0bbc1bf9353" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_da7695f2-7677-439a-ac62-7f738b334463" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_c8537c0d-1c3e-457b-ab35-c0bbc1bf9353" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_da7695f2-7677-439a-ac62-7f738b334463" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_23f88a36-b728-4bc8-bcce-f2b018ff27ed" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_97dc9c90-83a1-4426-81a8-6a92402b04bd" xlink:to="loc_us-gaap_DebtInstrumentAxis_23f88a36-b728-4bc8-bcce-f2b018ff27ed" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_23f88a36-b728-4bc8-bcce-f2b018ff27ed_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_23f88a36-b728-4bc8-bcce-f2b018ff27ed" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_23f88a36-b728-4bc8-bcce-f2b018ff27ed_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_22b0e80a-f35f-4cf8-b7a5-46beeed8f531" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_23f88a36-b728-4bc8-bcce-f2b018ff27ed" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_22b0e80a-f35f-4cf8-b7a5-46beeed8f531" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_RevolvingCreditFacilityDueApril2022Member_8aab1ae7-d7ea-4807-a474-9e3324e56e08" xlink:href="fnf-20231231.xsd#fnf_RevolvingCreditFacilityDueApril2022Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_22b0e80a-f35f-4cf8-b7a5-46beeed8f531" xlink:to="loc_fnf_RevolvingCreditFacilityDueApril2022Member_8aab1ae7-d7ea-4807-a474-9e3324e56e08" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseTermOfContract_ddde9741-5078-494f-b458-80e051891e0e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LesseeOperatingLeaseTermOfContract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7cf97ac0-be75-4a32-938c-e5bd5ab23ca9" xlink:to="loc_us-gaap_LesseeOperatingLeaseTermOfContract_ddde9741-5078-494f-b458-80e051891e0e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_ec37061c-7ebf-49bb-a3e2-e0c0d4cb9145" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7cf97ac0-be75-4a32-938c-e5bd5ab23ca9" xlink:to="loc_us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1_ec37061c-7ebf-49bb-a3e2-e0c0d4cb9145" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_LesseeOperatingLeaseNumberOfOptionsToRenew_6975ba4e-d864-449f-acf5-51cca1f1ab9f" xlink:href="fnf-20231231.xsd#fnf_LesseeOperatingLeaseNumberOfOptionsToRenew"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7cf97ac0-be75-4a32-938c-e5bd5ab23ca9" xlink:to="loc_fnf_LesseeOperatingLeaseNumberOfOptionsToRenew_6975ba4e-d864-449f-acf5-51cca1f1ab9f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_0f4b3739-bffb-48f2-81da-396a174e4e08" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7cf97ac0-be75-4a32-938c-e5bd5ab23ca9" xlink:to="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_0f4b3739-bffb-48f2-81da-396a174e4e08" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_be0b76ee-6165-45e3-a6b5-30f2cf8b6184" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7cf97ac0-be75-4a32-938c-e5bd5ab23ca9" xlink:to="loc_us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent_be0b76ee-6165-45e3-a6b5-30f2cf8b6184" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseCost_4dad1471-478e-4274-9c02-996178a108e2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingLeaseCost"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7cf97ac0-be75-4a32-938c-e5bd5ab23ca9" xlink:to="loc_us-gaap_OperatingLeaseCost_4dad1471-478e-4274-9c02-996178a108e2" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/PropertyandEquipmentDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#PropertyandEquipmentDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/PropertyandEquipmentDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_d81efffa-96e1-4453-91b0-552b4d2c3fd6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_fc333d1e-7ec1-4c5e-827a-87a9b2b1786b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfPropertyPlantAndEquipmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_d81efffa-96e1-4453-91b0-552b4d2c3fd6" xlink:to="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_fc333d1e-7ec1-4c5e-827a-87a9b2b1786b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_b83897f4-b224-4ec8-83ca-d3086f7e1303" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfPropertyPlantAndEquipmentTable_fc333d1e-7ec1-4c5e-827a-87a9b2b1786b" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_b83897f4-b224-4ec8-83ca-d3086f7e1303" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_b83897f4-b224-4ec8-83ca-d3086f7e1303_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_b83897f4-b224-4ec8-83ca-d3086f7e1303" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_b83897f4-b224-4ec8-83ca-d3086f7e1303_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_b5efc28d-0553-43ce-ba16-460591d86d2c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentByTypeAxis_b83897f4-b224-4ec8-83ca-d3086f7e1303" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_b5efc28d-0553-43ce-ba16-460591d86d2c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FurnitureFixturesandEquipmentMember_3204b023-304c-4958-86b5-20fa0728dcca" xlink:href="fnf-20231231.xsd#fnf_FurnitureFixturesandEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_b5efc28d-0553-43ce-ba16-460591d86d2c" xlink:to="loc_fnf_FurnitureFixturesandEquipmentMember_3204b023-304c-4958-86b5-20fa0728dcca" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TechnologyEquipmentMember_9cdff7eb-a483-4af1-aaf4-34f1d5b6f1cf" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TechnologyEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_b5efc28d-0553-43ce-ba16-460591d86d2c" xlink:to="loc_us-gaap_TechnologyEquipmentMember_9cdff7eb-a483-4af1-aaf4-34f1d5b6f1cf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LeaseholdImprovementsMember_81ed3333-fde2-4d89-a472-663b979e3212" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LeaseholdImprovementsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_b5efc28d-0553-43ce-ba16-460591d86d2c" xlink:to="loc_us-gaap_LeaseholdImprovementsMember_81ed3333-fde2-4d89-a472-663b979e3212" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BuildingMember_568bcc5b-6203-48a0-a411-41c6bd351c50" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BuildingMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_b5efc28d-0553-43ce-ba16-460591d86d2c" xlink:to="loc_us-gaap_BuildingMember_568bcc5b-6203-48a0-a411-41c6bd351c50" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LandMember_deba4aba-d596-4d52-8936-ef59dc6127f9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LandMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_b5efc28d-0553-43ce-ba16-460591d86d2c" xlink:to="loc_us-gaap_LandMember_deba4aba-d596-4d52-8936-ef59dc6127f9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherMachineryAndEquipmentMember_375a9811-3579-48d2-871e-05e44434c0ea" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherMachineryAndEquipmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentTypeDomain_b5efc28d-0553-43ce-ba16-460591d86d2c" xlink:to="loc_us-gaap_OtherMachineryAndEquipmentMember_375a9811-3579-48d2-871e-05e44434c0ea" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_f7f17fe0-03dd-42c6-9ee5-71ac4abeebef" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_d81efffa-96e1-4453-91b0-552b4d2c3fd6" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_f7f17fe0-03dd-42c6-9ee5-71ac4abeebef" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_490a74e9-129c-4db8-9af6-35d5e5283301" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_d81efffa-96e1-4453-91b0-552b4d2c3fd6" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_490a74e9-129c-4db8-9af6-35d5e5283301" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_82ec9ea4-e6ac-4a57-8064-d20a498a1add" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_d81efffa-96e1-4453-91b0-552b4d2c3fd6" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_82ec9ea4-e6ac-4a57-8064-d20a498a1add" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Depreciation_7714e2d3-1e34-4568-b10b-7fbf4537d06d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Depreciation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_d81efffa-96e1-4453-91b0-552b4d2c3fd6" xlink:to="loc_us-gaap_Depreciation_7714e2d3-1e34-4568-b10b-7fbf4537d06d" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/AccountsPayableandOtherAccruedLiabilitiesDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#AccountsPayableandOtherAccruedLiabilitiesDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/AccountsPayableandOtherAccruedLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_fnf_AccountsPayableLineItems_c86be7e3-7aa2-4f91-afb7-0cfd88ab6913" xlink:href="fnf-20231231.xsd#fnf_AccountsPayableLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_AccountsPayableTable_3b2fefa3-0b24-41b9-a6c3-1cac0c22434d" xlink:href="fnf-20231231.xsd#fnf_AccountsPayableTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_fnf_AccountsPayableLineItems_c86be7e3-7aa2-4f91-afb7-0cfd88ab6913" xlink:to="loc_fnf_AccountsPayableTable_3b2fefa3-0b24-41b9-a6c3-1cac0c22434d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByLiabilityClassAxis_e49b4bee-f90c-4b05-a53b-6876ea5f64b9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueByLiabilityClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_fnf_AccountsPayableTable_3b2fefa3-0b24-41b9-a6c3-1cac0c22434d" xlink:to="loc_us-gaap_FairValueByLiabilityClassAxis_e49b4bee-f90c-4b05-a53b-6876ea5f64b9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_e49b4bee-f90c-4b05-a53b-6876ea5f64b9_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_e49b4bee-f90c-4b05-a53b-6876ea5f64b9" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_e49b4bee-f90c-4b05-a53b-6876ea5f64b9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_1fd6bfbf-751a-436f-8519-816b4a6c1463" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_e49b4bee-f90c-4b05-a53b-6876ea5f64b9" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_1fd6bfbf-751a-436f-8519-816b4a6c1463" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_UnearnedRevenueLiabilitiesMember_0727afd8-cb36-43d3-938e-f36e2c08adf8" xlink:href="fnf-20231231.xsd#fnf_UnearnedRevenueLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_1fd6bfbf-751a-436f-8519-816b4a6c1463" xlink:to="loc_fnf_UnearnedRevenueLiabilitiesMember_0727afd8-cb36-43d3-938e-f36e2c08adf8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_DeferredRevenueMember_d03829dc-b13f-47ad-9802-0a1887b20a5b" xlink:href="fnf-20231231.xsd#fnf_DeferredRevenueMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_1fd6bfbf-751a-436f-8519-816b4a6c1463" xlink:to="loc_fnf_DeferredRevenueMember_d03829dc-b13f-47ad-9802-0a1887b20a5b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedSalariesCurrentAndNoncurrent_514a1b2f-b1dd-4218-ae00-33a95065a7de" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccruedSalariesCurrentAndNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_AccountsPayableLineItems_c86be7e3-7aa2-4f91-afb7-0cfd88ab6913" xlink:to="loc_us-gaap_AccruedSalariesCurrentAndNoncurrent_514a1b2f-b1dd-4218-ae00-33a95065a7de" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedEmployeeBenefitsCurrentAndNoncurrent_1722341e-21e5-45e9-938a-d80e6976cd8f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccruedEmployeeBenefitsCurrentAndNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_AccountsPayableLineItems_c86be7e3-7aa2-4f91-afb7-0cfd88ab6913" xlink:to="loc_us-gaap_AccruedEmployeeBenefitsCurrentAndNoncurrent_1722341e-21e5-45e9-938a-d80e6976cd8f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiability_53437691-1254-4008-b120-70562f5e0953" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ContractWithCustomerLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_AccountsPayableLineItems_c86be7e3-7aa2-4f91-afb7-0cfd88ab6913" xlink:to="loc_us-gaap_ContractWithCustomerLiability_53437691-1254-4008-b120-70562f5e0953" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_c35a4dd8-2aba-487d-a374-8ec58d046e55" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BusinessCombinationContingentConsiderationLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_AccountsPayableLineItems_c86be7e3-7aa2-4f91-afb7-0cfd88ab6913" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationLiability_c35a4dd8-2aba-487d-a374-8ec58d046e55" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableTradeCurrentAndNoncurrent_47e93780-54f8-44d1-8e64-dd2bb4c2ce23" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccountsPayableTradeCurrentAndNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_AccountsPayableLineItems_c86be7e3-7aa2-4f91-afb7-0cfd88ab6913" xlink:to="loc_us-gaap_AccountsPayableTradeCurrentAndNoncurrent_47e93780-54f8-44d1-8e64-dd2bb4c2ce23" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_AccrualforRecordingFeesandTransferTaxes_17d5a249-8f83-4b3b-8e41-739c0bb8f274" xlink:href="fnf-20231231.xsd#fnf_AccrualforRecordingFeesandTransferTaxes"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_AccountsPayableLineItems_c86be7e3-7aa2-4f91-afb7-0cfd88ab6913" xlink:to="loc_fnf_AccrualforRecordingFeesandTransferTaxes_17d5a249-8f83-4b3b-8e41-739c0bb8f274" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_AccruedPremiumTaxes_e896ee48-8fdd-4454-a304-84025147f6d4" xlink:href="fnf-20231231.xsd#fnf_AccruedPremiumTaxes"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_AccountsPayableLineItems_c86be7e3-7aa2-4f91-afb7-0cfd88ab6913" xlink:to="loc_fnf_AccruedPremiumTaxes_e896ee48-8fdd-4454-a304-84025147f6d4" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_LiabilityForPolicyAndContractClaims_0e4bf940-7e8c-4fa8-8ff2-9636fcbd7713" xlink:href="fnf-20231231.xsd#fnf_LiabilityForPolicyAndContractClaims"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_AccountsPayableLineItems_c86be7e3-7aa2-4f91-afb7-0cfd88ab6913" xlink:to="loc_fnf_LiabilityForPolicyAndContractClaims_0e4bf940-7e8c-4fa8-8ff2-9636fcbd7713" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_RetainedAssetAccount_75e62e70-6ab2-49da-9d66-0316ddd865b0" xlink:href="fnf-20231231.xsd#fnf_RetainedAssetAccount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_AccountsPayableLineItems_c86be7e3-7aa2-4f91-afb7-0cfd88ab6913" xlink:to="loc_fnf_RetainedAssetAccount_75e62e70-6ab2-49da-9d66-0316ddd865b0" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_RemittancesAndItemsNotAllocated_33ee673d-38f0-472d-9c41-a02beff375d5" xlink:href="fnf-20231231.xsd#fnf_RemittancesAndItemsNotAllocated"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_AccountsPayableLineItems_c86be7e3-7aa2-4f91-afb7-0cfd88ab6913" xlink:to="loc_fnf_RemittancesAndItemsNotAllocated_33ee673d-38f0-472d-9c41-a02beff375d5" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_DerivativeFuturesLiability_27311e35-6d2d-4315-879c-0d7a4385a88a" xlink:href="fnf-20231231.xsd#fnf_DerivativeFuturesLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_AccountsPayableLineItems_c86be7e3-7aa2-4f91-afb7-0cfd88ab6913" xlink:to="loc_fnf_DerivativeFuturesLiability_27311e35-6d2d-4315-879c-0d7a4385a88a" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAccruedLiabilitiesCurrentAndNoncurrent_bb324bf6-c2ec-4afa-ad91-cb62276f947b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherAccruedLiabilitiesCurrentAndNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_AccountsPayableLineItems_c86be7e3-7aa2-4f91-afb7-0cfd88ab6913" xlink:to="loc_us-gaap_OtherAccruedLiabilitiesCurrentAndNoncurrent_bb324bf6-c2ec-4afa-ad91-cb62276f947b" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent_9a959107-214d-49f3-aa06-360ec1e92bb3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_AccountsPayableLineItems_c86be7e3-7aa2-4f91-afb7-0cfd88ab6913" xlink:to="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent_9a959107-214d-49f3-aa06-360ec1e92bb3" xlink:type="arc" order="12"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/AccountsPayableandOtherAccruedLiabilitiesRollforwardofUnearnedRevenueLiabilitiesURLDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#AccountsPayableandOtherAccruedLiabilitiesRollforwardofUnearnedRevenueLiabilitiesURLDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/AccountsPayableandOtherAccruedLiabilitiesRollforwardofUnearnedRevenueLiabilitiesURLDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueLineItems_7eab93aa-4a51-46dd-a31d-2651a3f416f2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DisaggregationOfRevenueLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DisaggregationOfRevenueTable_71958d13-9298-447a-b04c-cf875248cb2f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DisaggregationOfRevenueTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_7eab93aa-4a51-46dd-a31d-2651a3f416f2" xlink:to="loc_us-gaap_DisaggregationOfRevenueTable_71958d13-9298-447a-b04c-cf875248cb2f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_e90afff2-8a9d-4c54-be83-8987e97e9c58" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_71958d13-9298-447a-b04c-cf875248cb2f" xlink:to="loc_srt_ProductOrServiceAxis_e90afff2-8a9d-4c54-be83-8987e97e9c58" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_e90afff2-8a9d-4c54-be83-8987e97e9c58_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_e90afff2-8a9d-4c54-be83-8987e97e9c58" xlink:to="loc_srt_ProductsAndServicesDomain_e90afff2-8a9d-4c54-be83-8987e97e9c58_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_42172166-5d95-4c14-801c-ec96cb8cfd73" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_e90afff2-8a9d-4c54-be83-8987e97e9c58" xlink:to="loc_srt_ProductsAndServicesDomain_42172166-5d95-4c14-801c-ec96cb8cfd73" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UniversalLifeMember_bf8401b6-615d-4385-a24c-74e7486dcc3a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UniversalLifeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_42172166-5d95-4c14-801c-ec96cb8cfd73" xlink:to="loc_us-gaap_UniversalLifeMember_bf8401b6-615d-4385-a24c-74e7486dcc3a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueByLiabilityClassAxis_e2b8e3ce-7918-4993-9cea-f018d1876f4c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueByLiabilityClassAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DisaggregationOfRevenueTable_71958d13-9298-447a-b04c-cf875248cb2f" xlink:to="loc_us-gaap_FairValueByLiabilityClassAxis_e2b8e3ce-7918-4993-9cea-f018d1876f4c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_e2b8e3ce-7918-4993-9cea-f018d1876f4c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_e2b8e3ce-7918-4993-9cea-f018d1876f4c" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_e2b8e3ce-7918-4993-9cea-f018d1876f4c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_0385bcaf-67a4-4d4a-9030-f1ff161419ab" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_FairValueByLiabilityClassAxis_e2b8e3ce-7918-4993-9cea-f018d1876f4c" xlink:to="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_0385bcaf-67a4-4d4a-9030-f1ff161419ab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_UnearnedRevenueLiabilitiesMember_0f50edb4-9b64-4e7f-86d0-88e11457058a" xlink:href="fnf-20231231.xsd#fnf_UnearnedRevenueLiabilitiesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationByLiabilityClassDomain_0385bcaf-67a4-4d4a-9030-f1ff161419ab" xlink:to="loc_fnf_UnearnedRevenueLiabilitiesMember_0f50edb4-9b64-4e7f-86d0-88e11457058a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_ContractWithCustomerLiabilityRollForward_a4e1afc1-bf27-4338-b07a-8e1fe188203e" xlink:href="fnf-20231231.xsd#fnf_ContractWithCustomerLiabilityRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DisaggregationOfRevenueLineItems_7eab93aa-4a51-46dd-a31d-2651a3f416f2" xlink:to="loc_fnf_ContractWithCustomerLiabilityRollForward_a4e1afc1-bf27-4338-b07a-8e1fe188203e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiability_df8f2a3c-5082-4efd-b9c7-a225fa493f1a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ContractWithCustomerLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_ContractWithCustomerLiabilityRollForward_a4e1afc1-bf27-4338-b07a-8e1fe188203e" xlink:to="loc_us-gaap_ContractWithCustomerLiability_df8f2a3c-5082-4efd-b9c7-a225fa493f1a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_ContractWithCustomerLiabilityAdditions_9aa9fc1d-8a92-408d-a3b3-4f7ff972877c" xlink:href="fnf-20231231.xsd#fnf_ContractWithCustomerLiabilityAdditions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_ContractWithCustomerLiabilityRollForward_a4e1afc1-bf27-4338-b07a-8e1fe188203e" xlink:to="loc_fnf_ContractWithCustomerLiabilityAdditions_9aa9fc1d-8a92-408d-a3b3-4f7ff972877c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_ContractWithCustomerAmortization_648cdb3a-a199-445b-a511-c6b7916d3908" xlink:href="fnf-20231231.xsd#fnf_ContractWithCustomerAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_ContractWithCustomerLiabilityRollForward_a4e1afc1-bf27-4338-b07a-8e1fe188203e" xlink:to="loc_fnf_ContractWithCustomerAmortization_648cdb3a-a199-445b-a511-c6b7916d3908" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiability_2334ec39-46b8-45ee-9a01-a1ffdb34c797" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ContractWithCustomerLiability"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/IncomeTaxesNarrativeDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#IncomeTaxesNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/IncomeTaxesNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowanceLineItems_1133df4c-faac-47cf-a4f9-0740a6f295b3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ValuationAllowanceLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowanceTable_2abc9e91-e70b-4c08-a320-8ee829564ee8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ValuationAllowanceTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ValuationAllowanceLineItems_1133df4c-faac-47cf-a4f9-0740a6f295b3" xlink:to="loc_us-gaap_ValuationAllowanceTable_2abc9e91-e70b-4c08-a320-8ee829564ee8" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_7a2c4103-70b8-49b8-bfd7-ba72eacb64c7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ValuationAllowanceTable_2abc9e91-e70b-4c08-a320-8ee829564ee8" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_7a2c4103-70b8-49b8-bfd7-ba72eacb64c7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_7a2c4103-70b8-49b8-bfd7-ba72eacb64c7_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_7a2c4103-70b8-49b8-bfd7-ba72eacb64c7" xlink:to="loc_us-gaap_SegmentDomain_7a2c4103-70b8-49b8-bfd7-ba72eacb64c7_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_af9ddde7-1501-4f49-bcb9-adef7ce93476" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_7a2c4103-70b8-49b8-bfd7-ba72eacb64c7" xlink:to="loc_us-gaap_SegmentDomain_af9ddde7-1501-4f49-bcb9-adef7ce93476" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_TitleSegmentMember_8ee81087-aed9-48fb-95b0-a8b8adfd4758" xlink:href="fnf-20231231.xsd#fnf_TitleSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_af9ddde7-1501-4f49-bcb9-adef7ce93476" xlink:to="loc_fnf_TitleSegmentMember_8ee81087-aed9-48fb-95b0-a8b8adfd4758" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FGSegmentMember_ffbac1da-32fe-4e35-9937-0e3577db3c1d" xlink:href="fnf-20231231.xsd#fnf_FGSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_af9ddde7-1501-4f49-bcb9-adef7ce93476" xlink:to="loc_fnf_FGSegmentMember_ffbac1da-32fe-4e35-9937-0e3577db3c1d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxPeriodAxis_253f364f-59b2-4db1-887e-71ab8e343337" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TaxPeriodAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ValuationAllowanceTable_2abc9e91-e70b-4c08-a320-8ee829564ee8" xlink:to="loc_us-gaap_TaxPeriodAxis_253f364f-59b2-4db1-887e-71ab8e343337" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxPeriodDomain_253f364f-59b2-4db1-887e-71ab8e343337_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TaxPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_TaxPeriodAxis_253f364f-59b2-4db1-887e-71ab8e343337" xlink:to="loc_us-gaap_TaxPeriodDomain_253f364f-59b2-4db1-887e-71ab8e343337_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxPeriodDomain_780b4bdd-bef5-403b-9a5f-d3df3c85a7d5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TaxPeriodDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_TaxPeriodAxis_253f364f-59b2-4db1-887e-71ab8e343337" xlink:to="loc_us-gaap_TaxPeriodDomain_780b4bdd-bef5-403b-9a5f-d3df3c85a7d5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EarliestTaxYearMember_745b14d3-bccc-47de-810a-e3b7044a4295" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EarliestTaxYearMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxPeriodDomain_780b4bdd-bef5-403b-9a5f-d3df3c85a7d5" xlink:to="loc_us-gaap_EarliestTaxYearMember_745b14d3-bccc-47de-810a-e3b7044a4295" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_OperatingLossCarryforwardAxis_e0f54362-db3e-458b-b22d-a08499ca9efc" xlink:href="fnf-20231231.xsd#fnf_OperatingLossCarryforwardAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ValuationAllowanceTable_2abc9e91-e70b-4c08-a320-8ee829564ee8" xlink:to="loc_fnf_OperatingLossCarryforwardAxis_e0f54362-db3e-458b-b22d-a08499ca9efc" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_OperatingLossCarryforwardDomain_e0f54362-db3e-458b-b22d-a08499ca9efc_default" xlink:href="fnf-20231231.xsd#fnf_OperatingLossCarryforwardDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_fnf_OperatingLossCarryforwardAxis_e0f54362-db3e-458b-b22d-a08499ca9efc" xlink:to="loc_fnf_OperatingLossCarryforwardDomain_e0f54362-db3e-458b-b22d-a08499ca9efc_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_OperatingLossCarryforwardDomain_b36a43be-bcd4-42a9-9104-6f266fa1d8a0" xlink:href="fnf-20231231.xsd#fnf_OperatingLossCarryforwardDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_fnf_OperatingLossCarryforwardAxis_e0f54362-db3e-458b-b22d-a08499ca9efc" xlink:to="loc_fnf_OperatingLossCarryforwardDomain_b36a43be-bcd4-42a9-9104-6f266fa1d8a0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_IRSSection382LimitedMember_eda30611-6f0a-4f9f-b7d7-e0ea956e8e74" xlink:href="fnf-20231231.xsd#fnf_IRSSection382LimitedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_OperatingLossCarryforwardDomain_b36a43be-bcd4-42a9-9104-6f266fa1d8a0" xlink:to="loc_fnf_IRSSection382LimitedMember_eda30611-6f0a-4f9f-b7d7-e0ea956e8e74" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxCreditCarryforwardAxis_c6ad8a42-6c1f-4139-b4d6-d62a62069ab1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TaxCreditCarryforwardAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ValuationAllowanceTable_2abc9e91-e70b-4c08-a320-8ee829564ee8" xlink:to="loc_us-gaap_TaxCreditCarryforwardAxis_c6ad8a42-6c1f-4139-b4d6-d62a62069ab1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxCreditCarryforwardNameDomain_c6ad8a42-6c1f-4139-b4d6-d62a62069ab1_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TaxCreditCarryforwardNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_TaxCreditCarryforwardAxis_c6ad8a42-6c1f-4139-b4d6-d62a62069ab1" xlink:to="loc_us-gaap_TaxCreditCarryforwardNameDomain_c6ad8a42-6c1f-4139-b4d6-d62a62069ab1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxCreditCarryforwardNameDomain_63b55f1b-2a26-4a44-ae75-967c516766f0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TaxCreditCarryforwardNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_TaxCreditCarryforwardAxis_c6ad8a42-6c1f-4139-b4d6-d62a62069ab1" xlink:to="loc_us-gaap_TaxCreditCarryforwardNameDomain_63b55f1b-2a26-4a44-ae75-967c516766f0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralBusinessMember_d6e8a168-120b-4474-8d91-82bad76d8e04" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GeneralBusinessMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_TaxCreditCarryforwardNameDomain_63b55f1b-2a26-4a44-ae75-967c516766f0" xlink:to="loc_us-gaap_GeneralBusinessMember_d6e8a168-120b-4474-8d91-82bad76d8e04" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowanceByDeferredTaxAssetAxis_cb6b5866-01f7-490b-9adc-df2916d46482" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ValuationAllowanceByDeferredTaxAssetAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ValuationAllowanceTable_2abc9e91-e70b-4c08-a320-8ee829564ee8" xlink:to="loc_us-gaap_ValuationAllowanceByDeferredTaxAssetAxis_cb6b5866-01f7-490b-9adc-df2916d46482" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetDomain_cb6b5866-01f7-490b-9adc-df2916d46482_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxAssetDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ValuationAllowanceByDeferredTaxAssetAxis_cb6b5866-01f7-490b-9adc-df2916d46482" xlink:to="loc_us-gaap_DeferredTaxAssetDomain_cb6b5866-01f7-490b-9adc-df2916d46482_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetDomain_945f9adb-5324-401a-bb3b-978ba4c3e1ed" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxAssetDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ValuationAllowanceByDeferredTaxAssetAxis_cb6b5866-01f7-490b-9adc-df2916d46482" xlink:to="loc_us-gaap_DeferredTaxAssetDomain_945f9adb-5324-401a-bb3b-978ba4c3e1ed" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralBusinessMember_ce29c5f2-d5ba-4c65-b89a-f6947dce486c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GeneralBusinessMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxAssetDomain_945f9adb-5324-401a-bb3b-978ba4c3e1ed" xlink:to="loc_us-gaap_GeneralBusinessMember_ce29c5f2-d5ba-4c65-b89a-f6947dce486c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_DeferredTaxAssetCapitalLossMember_e2087d9b-9b95-46f0-881a-85884e18c5e3" xlink:href="fnf-20231231.xsd#fnf_DeferredTaxAssetCapitalLossMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxAssetDomain_945f9adb-5324-401a-bb3b-978ba4c3e1ed" xlink:to="loc_fnf_DeferredTaxAssetCapitalLossMember_e2087d9b-9b95-46f0-881a-85884e18c5e3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_BermudaCorporateIncomeTaxNetOperatingLossCarryforwardMember_c6b60cc7-2e3d-47a8-8232-352129c9942d" xlink:href="fnf-20231231.xsd#fnf_BermudaCorporateIncomeTaxNetOperatingLossCarryforwardMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DeferredTaxAssetDomain_945f9adb-5324-401a-bb3b-978ba4c3e1ed" xlink:to="loc_fnf_BermudaCorporateIncomeTaxNetOperatingLossCarryforwardMember_c6b60cc7-2e3d-47a8-8232-352129c9942d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsegmentsAxis_650bb209-7eab-49d2-a8b7-74264fa73c40" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SubsegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ValuationAllowanceTable_2abc9e91-e70b-4c08-a320-8ee829564ee8" xlink:to="loc_us-gaap_SubsegmentsAxis_650bb209-7eab-49d2-a8b7-74264fa73c40" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsegmentsDomain_650bb209-7eab-49d2-a8b7-74264fa73c40_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SubsegmentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsegmentsAxis_650bb209-7eab-49d2-a8b7-74264fa73c40" xlink:to="loc_us-gaap_SubsegmentsDomain_650bb209-7eab-49d2-a8b7-74264fa73c40_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsegmentsDomain_1c049e29-a5f0-4064-9ca5-61d13df2f9b4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SubsegmentsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsegmentsAxis_650bb209-7eab-49d2-a8b7-74264fa73c40" xlink:to="loc_us-gaap_SubsegmentsDomain_1c049e29-a5f0-4064-9ca5-61d13df2f9b4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FGSubsidiariesMember_52927dc9-7acd-4d84-b882-704ba4f57e09" xlink:href="fnf-20231231.xsd#fnf_FGSubsidiariesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsegmentsDomain_1c049e29-a5f0-4064-9ca5-61d13df2f9b4" xlink:to="loc_fnf_FGSubsidiariesMember_52927dc9-7acd-4d84-b882-704ba4f57e09" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_0e3f9b6e-f498-4f70-924d-5cc3786b0ba8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxAssetsLiabilitiesNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowanceLineItems_1133df4c-faac-47cf-a4f9-0740a6f295b3" xlink:to="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_0e3f9b6e-f498-4f70-924d-5cc3786b0ba8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_IncreaseDecreaseInDeferredTaxLiabilitiesInvestmentsUnrealizedGains_70691523-c804-487d-9295-a5c9d783ba26" xlink:href="fnf-20231231.xsd#fnf_IncreaseDecreaseInDeferredTaxLiabilitiesInvestmentsUnrealizedGains"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowanceLineItems_1133df4c-faac-47cf-a4f9-0740a6f295b3" xlink:to="loc_fnf_IncreaseDecreaseInDeferredTaxLiabilitiesInvestmentsUnrealizedGains_70691523-c804-487d-9295-a5c9d783ba26" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_IncreaseDecreaseInDeferredTaxLiabilitiesDeferredPolicyAcquisitionCostsAndDeferredSalesInducements_3c7a54d1-0c7c-4d21-ac0e-a92e0bfb9bd2" xlink:href="fnf-20231231.xsd#fnf_IncreaseDecreaseInDeferredTaxLiabilitiesDeferredPolicyAcquisitionCostsAndDeferredSalesInducements"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowanceLineItems_1133df4c-faac-47cf-a4f9-0740a6f295b3" xlink:to="loc_fnf_IncreaseDecreaseInDeferredTaxLiabilitiesDeferredPolicyAcquisitionCostsAndDeferredSalesInducements_3c7a54d1-0c7c-4d21-ac0e-a92e0bfb9bd2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_IncreaseDecreaseDeferredTaxAssetReinsuranceReceivable_6b515a75-3a8f-4082-994d-8406d9403df9" xlink:href="fnf-20231231.xsd#fnf_IncreaseDecreaseDeferredTaxAssetReinsuranceReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowanceLineItems_1133df4c-faac-47cf-a4f9-0740a6f295b3" xlink:to="loc_fnf_IncreaseDecreaseDeferredTaxAssetReinsuranceReceivable_6b515a75-3a8f-4082-994d-8406d9403df9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_IncreaseDecreaseDeferredTaxLiabilityReinsuranceReceivable_6ac9aabf-2f30-4e16-babe-806a11667907" xlink:href="fnf-20231231.xsd#fnf_IncreaseDecreaseDeferredTaxLiabilityReinsuranceReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowanceLineItems_1133df4c-faac-47cf-a4f9-0740a6f295b3" xlink:to="loc_fnf_IncreaseDecreaseDeferredTaxLiabilityReinsuranceReceivable_6ac9aabf-2f30-4e16-babe-806a11667907" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_IncreaseDecreaseInDeferredTaxAssetLifeInsuranceReceivables_58f8fd1b-fa56-43a1-adee-a4594e7ef04e" xlink:href="fnf-20231231.xsd#fnf_IncreaseDecreaseInDeferredTaxAssetLifeInsuranceReceivables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowanceLineItems_1133df4c-faac-47cf-a4f9-0740a6f295b3" xlink:to="loc_fnf_IncreaseDecreaseInDeferredTaxAssetLifeInsuranceReceivables_58f8fd1b-fa56-43a1-adee-a4594e7ef04e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLossCarryforwards_57f0c5e4-7b12-4f9f-b7de-9667d535e20d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingLossCarryforwards"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowanceLineItems_1133df4c-faac-47cf-a4f9-0740a6f295b3" xlink:to="loc_us-gaap_OperatingLossCarryforwards_57f0c5e4-7b12-4f9f-b7de-9667d535e20d" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLossCarryforwardsValuationAllowance_5d4f0452-af57-417f-91e7-9de10747dff9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OperatingLossCarryforwardsValuationAllowance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowanceLineItems_1133df4c-faac-47cf-a4f9-0740a6f295b3" xlink:to="loc_us-gaap_OperatingLossCarryforwardsValuationAllowance_5d4f0452-af57-417f-91e7-9de10747dff9" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxCreditCarryforwards_c1d6ce5e-2dbb-4091-aa72-d09c723c22c7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxAssetsTaxCreditCarryforwards"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowanceLineItems_1133df4c-faac-47cf-a4f9-0740a6f295b3" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxCreditCarryforwards_c1d6ce5e-2dbb-4091-aa72-d09c723c22c7" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_DeferredTaxAssetForeignCorporateIncomeTaxNOLCarryforward_fa687a04-bf68-4567-b643-cc7ef9a0db34" xlink:href="fnf-20231231.xsd#fnf_DeferredTaxAssetForeignCorporateIncomeTaxNOLCarryforward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowanceLineItems_1133df4c-faac-47cf-a4f9-0740a6f295b3" xlink:to="loc_fnf_DeferredTaxAssetForeignCorporateIncomeTaxNOLCarryforward_fa687a04-bf68-4567-b643-cc7ef9a0db34" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsValuationAllowance_cb75484a-3764-41bd-a846-aae27ba75db3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredTaxAssetsValuationAllowance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowanceLineItems_1133df4c-faac-47cf-a4f9-0740a6f295b3" xlink:to="loc_us-gaap_DeferredTaxAssetsValuationAllowance_cb75484a-3764-41bd-a846-aae27ba75db3" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount_08088799-dd62-43d6-aaf2-81ed7d261d7a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowanceLineItems_1133df4c-faac-47cf-a4f9-0740a6f295b3" xlink:to="loc_us-gaap_ValuationAllowanceDeferredTaxAssetChangeInAmount_08088799-dd62-43d6-aaf2-81ed7d261d7a" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate_315f9885-a73b-4997-b297-a8789aa560e3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowanceLineItems_1133df4c-faac-47cf-a4f9-0740a6f295b3" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate_315f9885-a73b-4997-b297-a8789aa560e3" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued_255ac6e5-fee4-45e4-9629-f06655c928ac" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowanceLineItems_1133df4c-faac-47cf-a4f9-0740a6f295b3" xlink:to="loc_us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued_255ac6e5-fee4-45e4-9629-f06655c928ac" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReceivable_ff3467e9-3a32-4769-b58c-6592ba70fce9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeTaxReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ValuationAllowanceLineItems_1133df4c-faac-47cf-a4f9-0740a6f295b3" xlink:to="loc_us-gaap_IncomeTaxReceivable_ff3467e9-3a32-4769-b58c-6592ba70fce9" xlink:type="arc" order="14"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/EmployeeBenefitPlansStockPurchasePlanDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#EmployeeBenefitPlansStockPurchasePlanDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/EmployeeBenefitPlansStockPurchasePlanDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_6ec43855-7a77-466a-9a3a-8ac42c5a03a5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_44f4daf3-333d-4fe8-ab50-d7ddc9df9cbd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_6ec43855-7a77-466a-9a3a-8ac42c5a03a5" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_44f4daf3-333d-4fe8-ab50-d7ddc9df9cbd" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_1e0dee3f-109f-417e-aa4c-783a8e206dda" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_44f4daf3-333d-4fe8-ab50-d7ddc9df9cbd" xlink:to="loc_srt_RangeAxis_1e0dee3f-109f-417e-aa4c-783a8e206dda" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_1e0dee3f-109f-417e-aa4c-783a8e206dda_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_1e0dee3f-109f-417e-aa4c-783a8e206dda" xlink:to="loc_srt_RangeMember_1e0dee3f-109f-417e-aa4c-783a8e206dda_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_23d11a90-4e0e-4d18-80ab-d8ccefe6ac8c" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_1e0dee3f-109f-417e-aa4c-783a8e206dda" xlink:to="loc_srt_RangeMember_23d11a90-4e0e-4d18-80ab-d8ccefe6ac8c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_a4b7558a-fda9-4b63-8961-d5110ae4411f" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_23d11a90-4e0e-4d18-80ab-d8ccefe6ac8c" xlink:to="loc_srt_MinimumMember_a4b7558a-fda9-4b63-8961-d5110ae4411f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_6ea57592-bd5e-454a-bce5-666a5be37ccc" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_23d11a90-4e0e-4d18-80ab-d8ccefe6ac8c" xlink:to="loc_srt_MaximumMember_6ea57592-bd5e-454a-bce5-666a5be37ccc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_f9b6a95b-f9ee-4320-8a57-c8b0d2bf5131" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_44f4daf3-333d-4fe8-ab50-d7ddc9df9cbd" xlink:to="loc_us-gaap_AwardTypeAxis_f9b6a95b-f9ee-4320-8a57-c8b0d2bf5131" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_f9b6a95b-f9ee-4320-8a57-c8b0d2bf5131_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_f9b6a95b-f9ee-4320-8a57-c8b0d2bf5131" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_f9b6a95b-f9ee-4320-8a57-c8b0d2bf5131_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_18dcc17b-8da0-4284-ae10-8293d59abef4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_f9b6a95b-f9ee-4320-8a57-c8b0d2bf5131" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_18dcc17b-8da0-4284-ae10-8293d59abef4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockMember_e8d2fbbf-c820-4935-9348-9e24abe8b852" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EmployeeStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_18dcc17b-8da0-4284-ae10-8293d59abef4" xlink:to="loc_us-gaap_EmployeeStockMember_e8d2fbbf-c820-4935-9348-9e24abe8b852" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate_98b7cb27-1a16-48dc-a7fb-2fa4bbfb52ec" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_6ec43855-7a77-466a-9a3a-8ac42c5a03a5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate_98b7cb27-1a16-48dc-a7fb-2fa4bbfb52ec" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_1ae8527d-6602-4496-ba64-6f2d87938d70" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_6ec43855-7a77-466a-9a3a-8ac42c5a03a5" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_1ae8527d-6602-4496-ba64-6f2d87938d70" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/EmployeeBenefitPlansOmnibusIncentivePlanDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#EmployeeBenefitPlansOmnibusIncentivePlanDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/EmployeeBenefitPlansOmnibusIncentivePlanDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4c1d0e4a-0d76-4923-954d-fdbfe6c32c32" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_543b1aac-7d55-47e1-a64c-d749cbaa772b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4c1d0e4a-0d76-4923-954d-fdbfe6c32c32" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_543b1aac-7d55-47e1-a64c-d749cbaa772b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_a512c09b-cf94-49df-a14d-ab106dc00501" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_543b1aac-7d55-47e1-a64c-d749cbaa772b" xlink:to="loc_us-gaap_PlanNameAxis_a512c09b-cf94-49df-a14d-ab106dc00501" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_a512c09b-cf94-49df-a14d-ab106dc00501_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_a512c09b-cf94-49df-a14d-ab106dc00501" xlink:to="loc_us-gaap_PlanNameDomain_a512c09b-cf94-49df-a14d-ab106dc00501_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_c4b54897-8fa0-4778-8197-83387a32d7f9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_a512c09b-cf94-49df-a14d-ab106dc00501" xlink:to="loc_us-gaap_PlanNameDomain_c4b54897-8fa0-4778-8197-83387a32d7f9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_TheOmnibusPlanMember_b41a1b0c-94bf-448c-ada2-4a8f52ca0ee7" xlink:href="fnf-20231231.xsd#fnf_TheOmnibusPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_c4b54897-8fa0-4778-8197-83387a32d7f9" xlink:to="loc_fnf_TheOmnibusPlanMember_b41a1b0c-94bf-448c-ada2-4a8f52ca0ee7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_f0291cbf-49fc-4673-8951-4be275ee00f5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_543b1aac-7d55-47e1-a64c-d749cbaa772b" xlink:to="loc_us-gaap_AwardTypeAxis_f0291cbf-49fc-4673-8951-4be275ee00f5" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_f0291cbf-49fc-4673-8951-4be275ee00f5_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_f0291cbf-49fc-4673-8951-4be275ee00f5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_f0291cbf-49fc-4673-8951-4be275ee00f5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_7759775e-48ad-49b1-b43f-af7c7b87ca87" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_f0291cbf-49fc-4673-8951-4be275ee00f5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_7759775e-48ad-49b1-b43f-af7c7b87ca87" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_a8e33c9a-4f90-4243-b181-11c4b4b77ccf" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_7759775e-48ad-49b1-b43f-af7c7b87ca87" xlink:to="loc_us-gaap_RestrictedStockMember_a8e33c9a-4f90-4243-b181-11c4b4b77ccf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_29c053c9-15b9-4de1-9f4d-5cea050e7ab9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_7759775e-48ad-49b1-b43f-af7c7b87ca87" xlink:to="loc_us-gaap_EmployeeStockOptionMember_29c053c9-15b9-4de1-9f4d-5cea050e7ab9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_c2a50a91-286a-49e6-aaf9-217bc9cea2cf" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4c1d0e4a-0d76-4923-954d-fdbfe6c32c32" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_c2a50a91-286a-49e6-aaf9-217bc9cea2cf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized_8fe05607-984c-412a-a99d-2b39afbeb7ce" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4c1d0e4a-0d76-4923-954d-fdbfe6c32c32" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfAdditionalSharesAuthorized_8fe05607-984c-412a-a99d-2b39afbeb7ce" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_46bdcb15-9594-4b6f-b99e-86656c22ba7c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4c1d0e4a-0d76-4923-954d-fdbfe6c32c32" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_46bdcb15-9594-4b6f-b99e-86656c22ba7c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_6c96d6a0-fca0-49a0-b5bd-05ada8b98a9b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4c1d0e4a-0d76-4923-954d-fdbfe6c32c32" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_6c96d6a0-fca0-49a0-b5bd-05ada8b98a9b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_be3f60c9-70f6-436d-9155-2a3c7ebb050e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4c1d0e4a-0d76-4923-954d-fdbfe6c32c32" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_be3f60c9-70f6-436d-9155-2a3c7ebb050e" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_c680815a-2cb6-4912-9298-20a0ebe5efd0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_4c1d0e4a-0d76-4923-954d-fdbfe6c32c32" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_c680815a-2cb6-4912-9298-20a0ebe5efd0" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/EmployeeBenefitPlansFGOmnibusIncentivePlanDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#EmployeeBenefitPlansFGOmnibusIncentivePlanDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/EmployeeBenefitPlansFGOmnibusIncentivePlanDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_38e12adb-10c8-4d83-b65b-d8e7818731a7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_e437b404-fdac-40a5-8474-59aab3dfa9ff" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_38e12adb-10c8-4d83-b65b-d8e7818731a7" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_e437b404-fdac-40a5-8474-59aab3dfa9ff" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_d3432386-3959-4150-ad5a-e53344ea2daf" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_e437b404-fdac-40a5-8474-59aab3dfa9ff" xlink:to="loc_us-gaap_PlanNameAxis_d3432386-3959-4150-ad5a-e53344ea2daf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_d3432386-3959-4150-ad5a-e53344ea2daf_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_d3432386-3959-4150-ad5a-e53344ea2daf" xlink:to="loc_us-gaap_PlanNameDomain_d3432386-3959-4150-ad5a-e53344ea2daf_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_c6165c80-d82a-4f9c-a578-2fcc9c64309d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_d3432386-3959-4150-ad5a-e53344ea2daf" xlink:to="loc_us-gaap_PlanNameDomain_c6165c80-d82a-4f9c-a578-2fcc9c64309d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FGOmnibusPlanMember_2dd32750-fda1-462d-81fb-07257b5efe4d" xlink:href="fnf-20231231.xsd#fnf_FGOmnibusPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_c6165c80-d82a-4f9c-a578-2fcc9c64309d" xlink:to="loc_fnf_FGOmnibusPlanMember_2dd32750-fda1-462d-81fb-07257b5efe4d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_82af3bdb-3b2d-4460-814f-3170b804c285" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_e437b404-fdac-40a5-8474-59aab3dfa9ff" xlink:to="loc_us-gaap_AwardTypeAxis_82af3bdb-3b2d-4460-814f-3170b804c285" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_82af3bdb-3b2d-4460-814f-3170b804c285_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_82af3bdb-3b2d-4460-814f-3170b804c285" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_82af3bdb-3b2d-4460-814f-3170b804c285_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_5d87ed86-52b6-414e-841c-ee51820781be" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_82af3bdb-3b2d-4460-814f-3170b804c285" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_5d87ed86-52b6-414e-841c-ee51820781be" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeStockOptionMember_8ac7dafa-6a72-4e04-96b0-65f8c37126b8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EmployeeStockOptionMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_5d87ed86-52b6-414e-841c-ee51820781be" xlink:to="loc_us-gaap_EmployeeStockOptionMember_8ac7dafa-6a72-4e04-96b0-65f8c37126b8" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_859140f0-2bc2-43bf-b682-43504f80f0e5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_5d87ed86-52b6-414e-841c-ee51820781be" xlink:to="loc_us-gaap_RestrictedStockMember_859140f0-2bc2-43bf-b682-43504f80f0e5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_42dc492d-2dfc-46db-8afc-7eb1d24da2c5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_38e12adb-10c8-4d83-b65b-d8e7818731a7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_42dc492d-2dfc-46db-8afc-7eb1d24da2c5" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_5b183af7-f037-4247-8ba2-2607fd2ac185" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_38e12adb-10c8-4d83-b65b-d8e7818731a7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1_5b183af7-f037-4247-8ba2-2607fd2ac185" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_afd551ba-4e4a-483f-bdef-218437f02b56" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_38e12adb-10c8-4d83-b65b-d8e7818731a7" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_afd551ba-4e4a-483f-bdef-218437f02b56" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_fa634282-90b4-4b51-a14d-9d5a2cf60b24" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_38e12adb-10c8-4d83-b65b-d8e7818731a7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber_fa634282-90b4-4b51-a14d-9d5a2cf60b24" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_8922ff3e-cac7-4d94-a7bd-3b3a55e7be16" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_38e12adb-10c8-4d83-b65b-d8e7818731a7" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_8922ff3e-cac7-4d94-a7bd-3b3a55e7be16" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/EmployeeBenefitPlansStockOptionActivityDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#EmployeeBenefitPlansStockOptionActivityDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/EmployeeBenefitPlansStockOptionActivityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_772680fc-47ab-4449-b488-f63d716361ce" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_bc2926b6-496b-4a9c-9b9e-aac72753c3eb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_772680fc-47ab-4449-b488-f63d716361ce" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_bc2926b6-496b-4a9c-9b9e-aac72753c3eb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_fed0eca2-3f8d-4e4e-b6e8-81b71a84ed71" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_bc2926b6-496b-4a9c-9b9e-aac72753c3eb" xlink:to="loc_us-gaap_PlanNameAxis_fed0eca2-3f8d-4e4e-b6e8-81b71a84ed71" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_fed0eca2-3f8d-4e4e-b6e8-81b71a84ed71_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_fed0eca2-3f8d-4e4e-b6e8-81b71a84ed71" xlink:to="loc_us-gaap_PlanNameDomain_fed0eca2-3f8d-4e4e-b6e8-81b71a84ed71_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_b3bd4217-e886-410d-95b5-df11101b411a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_fed0eca2-3f8d-4e4e-b6e8-81b71a84ed71" xlink:to="loc_us-gaap_PlanNameDomain_b3bd4217-e886-410d-95b5-df11101b411a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_TheOmnibusPlanMember_fdc7b96a-12b2-4ae7-a853-87f0c4336e5d" xlink:href="fnf-20231231.xsd#fnf_TheOmnibusPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_b3bd4217-e886-410d-95b5-df11101b411a" xlink:to="loc_fnf_TheOmnibusPlanMember_fdc7b96a-12b2-4ae7-a853-87f0c4336e5d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FGOmnibusPlanMember_86ba069e-2ca0-4bfd-a877-246d91a3a6d2" xlink:href="fnf-20231231.xsd#fnf_FGOmnibusPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_b3bd4217-e886-410d-95b5-df11101b411a" xlink:to="loc_fnf_FGOmnibusPlanMember_86ba069e-2ca0-4bfd-a877-246d91a3a6d2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_e19ba47f-e4dc-4396-9457-d062f1b9481c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_772680fc-47ab-4449-b488-f63d716361ce" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_e19ba47f-e4dc-4396-9457-d062f1b9481c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_59e31871-b56c-47fc-a7f8-1a60fca2eaab" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_e19ba47f-e4dc-4396-9457-d062f1b9481c" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_59e31871-b56c-47fc-a7f8-1a60fca2eaab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_56d76153-3f76-481b-a9f1-03237f95e349" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_e19ba47f-e4dc-4396-9457-d062f1b9481c" xlink:to="loc_us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_56d76153-3f76-481b-a9f1-03237f95e349" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod_f0022244-b92d-4d9e-aa4e-8796a9e38de9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingRollForward_e19ba47f-e4dc-4396-9457-d062f1b9481c" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod_f0022244-b92d-4d9e-aa4e-8796a9e38de9" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_19a046da-9247-4967-a26c-de37a870c055" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_42ae4cf5-7b58-427d-acad-79d9fb55ef18" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_772680fc-47ab-4449-b488-f63d716361ce" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_42ae4cf5-7b58-427d-acad-79d9fb55ef18" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_b87c3119-9101-46f3-9b2f-0af7edfbd51d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_42ae4cf5-7b58-427d-acad-79d9fb55ef18" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_b87c3119-9101-46f3-9b2f-0af7edfbd51d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_3d2a8181-8f27-431f-9e5e-30e03ae8d550" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_42ae4cf5-7b58-427d-acad-79d9fb55ef18" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_3d2a8181-8f27-431f-9e5e-30e03ae8d550" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice_ec391570-eb8a-40b0-8d00-51af6989330d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePriceRollforward_42ae4cf5-7b58-427d-acad-79d9fb55ef18" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice_ec391570-eb8a-40b0-8d00-51af6989330d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_88a607da-551e-4814-ba2e-3b10a66a6951" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_8b3afbae-b97b-4470-8d95-6ab0f054ef39" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_772680fc-47ab-4449-b488-f63d716361ce" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_8b3afbae-b97b-4470-8d95-6ab0f054ef39" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_f4519eb8-212d-4c9c-8193-1922e582020b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAdditionalDisclosuresAbstract_8b3afbae-b97b-4470-8d95-6ab0f054ef39" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_f4519eb8-212d-4c9c-8193-1922e582020b" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/EmployeeBenefitPlansRestrictedStockActivityDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#EmployeeBenefitPlansRestrictedStockActivityDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/EmployeeBenefitPlansRestrictedStockActivityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_d7bdf1c1-71be-4e75-9af6-ffba4fa85fd5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_9c43d0fe-f2cd-42d3-b8fd-f47a0594a094" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_d7bdf1c1-71be-4e75-9af6-ffba4fa85fd5" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_9c43d0fe-f2cd-42d3-b8fd-f47a0594a094" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_8f1b49a7-f6a8-4964-90ca-ec1d2bb39132" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_9c43d0fe-f2cd-42d3-b8fd-f47a0594a094" xlink:to="loc_us-gaap_PlanNameAxis_8f1b49a7-f6a8-4964-90ca-ec1d2bb39132" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_8f1b49a7-f6a8-4964-90ca-ec1d2bb39132_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_8f1b49a7-f6a8-4964-90ca-ec1d2bb39132" xlink:to="loc_us-gaap_PlanNameDomain_8f1b49a7-f6a8-4964-90ca-ec1d2bb39132_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_23c90a76-c3b4-4f21-94af-366cdacee403" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_8f1b49a7-f6a8-4964-90ca-ec1d2bb39132" xlink:to="loc_us-gaap_PlanNameDomain_23c90a76-c3b4-4f21-94af-366cdacee403" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_TheOmnibusPlanMember_bd40611d-105b-4e4e-9677-ffaa6e41183f" xlink:href="fnf-20231231.xsd#fnf_TheOmnibusPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_23c90a76-c3b4-4f21-94af-366cdacee403" xlink:to="loc_fnf_TheOmnibusPlanMember_bd40611d-105b-4e4e-9677-ffaa6e41183f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FGOmnibusPlanMember_c4972d13-724d-4a9b-9d97-742f448db7a9" xlink:href="fnf-20231231.xsd#fnf_FGOmnibusPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_23c90a76-c3b4-4f21-94af-366cdacee403" xlink:to="loc_fnf_FGOmnibusPlanMember_c4972d13-724d-4a9b-9d97-742f448db7a9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_fe02d505-0017-43f9-ace9-097323e15edb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_9c43d0fe-f2cd-42d3-b8fd-f47a0594a094" xlink:to="loc_us-gaap_AwardTypeAxis_fe02d505-0017-43f9-ace9-097323e15edb" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_fe02d505-0017-43f9-ace9-097323e15edb_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_fe02d505-0017-43f9-ace9-097323e15edb" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_fe02d505-0017-43f9-ace9-097323e15edb_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_d3be5299-95ca-4f8b-b979-af203b51684a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_fe02d505-0017-43f9-ace9-097323e15edb" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_d3be5299-95ca-4f8b-b979-af203b51684a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_868c7cad-f7d9-4a54-8d3d-3c1a2ffe6e8f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_d3be5299-95ca-4f8b-b979-af203b51684a" xlink:to="loc_us-gaap_RestrictedStockMember_868c7cad-f7d9-4a54-8d3d-3c1a2ffe6e8f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_3459d709-28ec-4f5e-9dd9-3e025b62f646" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_9c43d0fe-f2cd-42d3-b8fd-f47a0594a094" xlink:to="loc_us-gaap_StatementClassOfStockAxis_3459d709-28ec-4f5e-9dd9-3e025b62f646" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_3459d709-28ec-4f5e-9dd9-3e025b62f646_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_3459d709-28ec-4f5e-9dd9-3e025b62f646" xlink:to="loc_us-gaap_ClassOfStockDomain_3459d709-28ec-4f5e-9dd9-3e025b62f646_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_297dfa24-3fc1-4ebb-90ca-2338a635d2db" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_3459d709-28ec-4f5e-9dd9-3e025b62f646" xlink:to="loc_us-gaap_ClassOfStockDomain_297dfa24-3fc1-4ebb-90ca-2338a635d2db" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FidelityNationalFinancialGroupCommonStockMember_49d83edc-3007-4add-b606-ef93428494a4" xlink:href="fnf-20231231.xsd#fnf_FidelityNationalFinancialGroupCommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_297dfa24-3fc1-4ebb-90ca-2338a635d2db" xlink:to="loc_fnf_FidelityNationalFinancialGroupCommonStockMember_49d83edc-3007-4add-b606-ef93428494a4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_d45925d9-ef61-46fd-93da-a39e7a887d69" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_d7bdf1c1-71be-4e75-9af6-ffba4fa85fd5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_d45925d9-ef61-46fd-93da-a39e7a887d69" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_0c925945-c47a-411d-ac1a-f3cf5b8e7e7a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_d45925d9-ef61-46fd-93da-a39e7a887d69" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_0c925945-c47a-411d-ac1a-f3cf5b8e7e7a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_263833cf-5d7c-46a1-bfef-36565c0fc280" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_d45925d9-ef61-46fd-93da-a39e7a887d69" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_263833cf-5d7c-46a1-bfef-36565c0fc280" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_dcbb4824-ab43-49e9-b2b2-7135b580ff4d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_d45925d9-ef61-46fd-93da-a39e7a887d69" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod_dcbb4824-ab43-49e9-b2b2-7135b580ff4d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_03b8b526-d69b-42fb-bfb6-d22019c47899" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedRollForward_d45925d9-ef61-46fd-93da-a39e7a887d69" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_03b8b526-d69b-42fb-bfb6-d22019c47899" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_90ba056e-38c9-4f0f-a7f2-063d114fa8c5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_aec5c5fb-8ce5-4715-925d-97057b2f7097" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_d7bdf1c1-71be-4e75-9af6-ffba4fa85fd5" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_aec5c5fb-8ce5-4715-925d-97057b2f7097" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_de288b56-a3ef-4921-ae9e-c1b41657d935" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_aec5c5fb-8ce5-4715-925d-97057b2f7097" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_de288b56-a3ef-4921-ae9e-c1b41657d935" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_d9dfbb08-e954-4a24-8ea7-39199e82896f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_aec5c5fb-8ce5-4715-925d-97057b2f7097" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_d9dfbb08-e954-4a24-8ea7-39199e82896f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_4d20ff3f-a2ab-49bc-a8c9-9da55b589db6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_aec5c5fb-8ce5-4715-925d-97057b2f7097" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_4d20ff3f-a2ab-49bc-a8c9-9da55b589db6" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_1a885f79-0825-4802-83c0-8689803046d9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValueRollForward_aec5c5fb-8ce5-4715-925d-97057b2f7097" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_1a885f79-0825-4802-83c0-8689803046d9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_fa64fdec-410b-49c7-82c3-a8a10d9ee736" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/EmployeeBenefitPlansOptionsOutstandingandExercisablebyExercisePriceDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#EmployeeBenefitPlansOptionsOutstandingandExercisablebyExercisePriceDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/EmployeeBenefitPlansOptionsOutstandingandExercisablebyExercisePriceDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_9b339cfd-bf91-44d6-95ec-e0498d2da9d1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTable_11d84acf-c999-4860-ac70-272d857cb7c2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_9b339cfd-bf91-44d6-95ec-e0498d2da9d1" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTable_11d84acf-c999-4860-ac70-272d857cb7c2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_3ef9e8ec-902e-447f-b49c-facdbc28d32b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTable_11d84acf-c999-4860-ac70-272d857cb7c2" xlink:to="loc_us-gaap_PlanNameAxis_3ef9e8ec-902e-447f-b49c-facdbc28d32b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_3ef9e8ec-902e-447f-b49c-facdbc28d32b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_3ef9e8ec-902e-447f-b49c-facdbc28d32b" xlink:to="loc_us-gaap_PlanNameDomain_3ef9e8ec-902e-447f-b49c-facdbc28d32b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_6d874094-7031-4b59-821b-75eb13b3bd03" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_3ef9e8ec-902e-447f-b49c-facdbc28d32b" xlink:to="loc_us-gaap_PlanNameDomain_6d874094-7031-4b59-821b-75eb13b3bd03" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_TheOmnibusPlanMember_aa3f38cb-323f-49e0-94e4-572ba5b17704" xlink:href="fnf-20231231.xsd#fnf_TheOmnibusPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_6d874094-7031-4b59-821b-75eb13b3bd03" xlink:to="loc_fnf_TheOmnibusPlanMember_aa3f38cb-323f-49e0-94e4-572ba5b17704" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_2c28f4f3-469f-4681-bb3e-6a53ee35de84" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeTable_11d84acf-c999-4860-ac70-272d857cb7c2" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_2c28f4f3-469f-4681-bb3e-6a53ee35de84" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_2c28f4f3-469f-4681-bb3e-6a53ee35de84_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_2c28f4f3-469f-4681-bb3e-6a53ee35de84" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_2c28f4f3-469f-4681-bb3e-6a53ee35de84_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_905dec13-3877-49be-b47a-b4300bf8a111" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis_2c28f4f3-469f-4681-bb3e-6a53ee35de84" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_905dec13-3877-49be-b47a-b4300bf8a111" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_ExercisePriceRangeOneMember_1fb2e6ec-d8e9-42a4-b392-ab8bfa98e750" xlink:href="fnf-20231231.xsd#fnf_ExercisePriceRangeOneMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_905dec13-3877-49be-b47a-b4300bf8a111" xlink:to="loc_fnf_ExercisePriceRangeOneMember_1fb2e6ec-d8e9-42a4-b392-ab8bfa98e750" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_ExercisePriceRange2Member_1c47807a-da7d-4973-bd35-b98f25ec7698" xlink:href="fnf-20231231.xsd#fnf_ExercisePriceRange2Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeDomain_905dec13-3877-49be-b47a-b4300bf8a111" xlink:to="loc_fnf_ExercisePriceRange2Member_1c47807a-da7d-4973-bd35-b98f25ec7698" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit_4aa6d6e3-ecca-4c0e-845b-6c287d47bf89" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_9b339cfd-bf91-44d6-95ec-e0498d2da9d1" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit_4aa6d6e3-ecca-4c0e-845b-6c287d47bf89" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit_0af8d0f8-177b-42d4-bd3e-797bdda933f3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_9b339cfd-bf91-44d6-95ec-e0498d2da9d1" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit_0af8d0f8-177b-42d4-bd3e-797bdda933f3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions_c19c45fe-7b62-4c40-ad57-8b602d3e0eaf" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_9b339cfd-bf91-44d6-95ec-e0498d2da9d1" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions_c19c45fe-7b62-4c40-ad57-8b602d3e0eaf" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2_3d0ff675-9dbf-4fcb-9a5b-6b1c8fa008e1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_9b339cfd-bf91-44d6-95ec-e0498d2da9d1" xlink:to="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageRemainingContractualTerm2_3d0ff675-9dbf-4fcb-9a5b-6b1c8fa008e1" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1_20917fe1-4fd6-4e63-a55f-313a9d77eccc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_9b339cfd-bf91-44d6-95ec-e0498d2da9d1" xlink:to="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1_20917fe1-4fd6-4e63-a55f-313a9d77eccc" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_b0bcae97-a21a-4831-98d3-6af65a5babf7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_9b339cfd-bf91-44d6-95ec-e0498d2da9d1" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_b0bcae97-a21a-4831-98d3-6af65a5babf7" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions_0c931336-3d81-45ac-a910-c5b57ac4ec4c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_9b339cfd-bf91-44d6-95ec-e0498d2da9d1" xlink:to="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions_0c931336-3d81-45ac-a910-c5b57ac4ec4c" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageRemainingContractualTerm2_6efc4086-4cd4-49ea-a23b-9f7336483860" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageRemainingContractualTerm2"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_9b339cfd-bf91-44d6-95ec-e0498d2da9d1" xlink:to="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageRemainingContractualTerm2_6efc4086-4cd4-49ea-a23b-9f7336483860" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1_78510fc9-f825-4c37-97ba-4b890da72cab" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_9b339cfd-bf91-44d6-95ec-e0498d2da9d1" xlink:to="loc_us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1_78510fc9-f825-4c37-97ba-4b890da72cab" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_df4e460c-1e2b-4eac-9d8b-ba27cce42227" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLineItems_9b339cfd-bf91-44d6-95ec-e0498d2da9d1" xlink:to="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_df4e460c-1e2b-4eac-9d8b-ba27cce42227" xlink:type="arc" order="9"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/EmployeeBenefitPlansNarrativeDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#EmployeeBenefitPlansNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/EmployeeBenefitPlansNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a78b5e60-9497-4856-ba9d-bc4a190fd0d8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_f64a82a9-aec2-4e9f-9ce7-dc6ca14563be" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a78b5e60-9497-4856-ba9d-bc4a190fd0d8" xlink:to="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_f64a82a9-aec2-4e9f-9ce7-dc6ca14563be" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameAxis_0ddeee58-ed3e-44bc-ab46-7c6a53eea518" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PlanNameAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_f64a82a9-aec2-4e9f-9ce7-dc6ca14563be" xlink:to="loc_us-gaap_PlanNameAxis_0ddeee58-ed3e-44bc-ab46-7c6a53eea518" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_0ddeee58-ed3e-44bc-ab46-7c6a53eea518_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PlanNameAxis_0ddeee58-ed3e-44bc-ab46-7c6a53eea518" xlink:to="loc_us-gaap_PlanNameDomain_0ddeee58-ed3e-44bc-ab46-7c6a53eea518_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PlanNameDomain_cc819538-6635-4f72-866e-d2875314ea3f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PlanNameAxis_0ddeee58-ed3e-44bc-ab46-7c6a53eea518" xlink:to="loc_us-gaap_PlanNameDomain_cc819538-6635-4f72-866e-d2875314ea3f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_TheOmnibusPlanMember_fb8b0f9e-b69f-4d0e-b6ae-8c45898f1111" xlink:href="fnf-20231231.xsd#fnf_TheOmnibusPlanMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PlanNameDomain_cc819538-6635-4f72-866e-d2875314ea3f" xlink:to="loc_fnf_TheOmnibusPlanMember_fb8b0f9e-b69f-4d0e-b6ae-8c45898f1111" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AwardTypeAxis_233c3872-f98e-4179-9944-55b1a23f8398" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AwardTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_f64a82a9-aec2-4e9f-9ce7-dc6ca14563be" xlink:to="loc_us-gaap_AwardTypeAxis_233c3872-f98e-4179-9944-55b1a23f8398" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_233c3872-f98e-4179-9944-55b1a23f8398_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_AwardTypeAxis_233c3872-f98e-4179-9944-55b1a23f8398" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_233c3872-f98e-4179-9944-55b1a23f8398_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_86d4032a-3076-4077-9aa1-e56d5ac6745b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_AwardTypeAxis_233c3872-f98e-4179-9944-55b1a23f8398" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_86d4032a-3076-4077-9aa1-e56d5ac6745b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedStockMember_1a00dd87-a255-4e69-be67-2fb984c8b47a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RestrictedStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardAwardTypeAndPlanNameDomain_86d4032a-3076-4077-9aa1-e56d5ac6745b" xlink:to="loc_us-gaap_RestrictedStockMember_1a00dd87-a255-4e69-be67-2fb984c8b47a" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_6c79110a-2b6e-4bd1-b1ed-1e276fada381" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_f64a82a9-aec2-4e9f-9ce7-dc6ca14563be" xlink:to="loc_us-gaap_StatementClassOfStockAxis_6c79110a-2b6e-4bd1-b1ed-1e276fada381" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_6c79110a-2b6e-4bd1-b1ed-1e276fada381_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_6c79110a-2b6e-4bd1-b1ed-1e276fada381" xlink:to="loc_us-gaap_ClassOfStockDomain_6c79110a-2b6e-4bd1-b1ed-1e276fada381_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_92695f84-94a4-42fe-81ad-23833ea2e221" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_6c79110a-2b6e-4bd1-b1ed-1e276fada381" xlink:to="loc_us-gaap_ClassOfStockDomain_92695f84-94a4-42fe-81ad-23833ea2e221" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FidelityNationalFinancialGroupCommonStockMember_30caf2ee-9115-4558-9171-982f1877a82d" xlink:href="fnf-20231231.xsd#fnf_FidelityNationalFinancialGroupCommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_92695f84-94a4-42fe-81ad-23833ea2e221" xlink:to="loc_fnf_FidelityNationalFinancialGroupCommonStockMember_30caf2ee-9115-4558-9171-982f1877a82d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantDateFairValue_18bc314e-fdb6-4f50-a34b-c7fec8ae5bff" xlink:href="fnf-20231231.xsd#fnf_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantDateFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a78b5e60-9497-4856-ba9d-bc4a190fd0d8" xlink:to="loc_fnf_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantDateFairValue_18bc314e-fdb6-4f50-a34b-c7fec8ae5bff" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_3205737d-9092-491b-968c-6ae9f7d9acf9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a78b5e60-9497-4856-ba9d-bc4a190fd0d8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_3205737d-9092-491b-968c-6ae9f7d9acf9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_fa9b6b44-b3c0-4763-9500-0636a85e26d8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a78b5e60-9497-4856-ba9d-bc4a190fd0d8" xlink:to="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue_fa9b6b44-b3c0-4763-9500-0636a85e26d8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensation_6af6a87c-52a7-4710-8b16-36ae6a70b072" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a78b5e60-9497-4856-ba9d-bc4a190fd0d8" xlink:to="loc_us-gaap_ShareBasedCompensation_6af6a87c-52a7-4710-8b16-36ae6a70b072" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_7752b148-e7f9-4551-95a1-490c54f490d1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a78b5e60-9497-4856-ba9d-bc4a190fd0d8" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_7752b148-e7f9-4551-95a1-490c54f490d1" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_00fa5d27-a0e6-4d0a-8785-5d1a4a7671d9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_a78b5e60-9497-4856-ba9d-bc4a190fd0d8" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1_00fa5d27-a0e6-4d0a-8785-5d1a4a7671d9" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/EmployeeBenefitPlansPensionPlansDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#EmployeeBenefitPlansPensionPlansDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/EmployeeBenefitPlansPensionPlansDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_3f64dffb-1aca-494f-a3af-e0abd3eec3bc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_d717c39e-f158-4e04-8f6b-98335130bea2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_3f64dffb-1aca-494f-a3af-e0abd3eec3bc" xlink:to="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_d717c39e-f158-4e04-8f6b-98335130bea2" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeAxis_1d3f4826-1441-4cfb-9cbd-7df474e7532b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetirementPlanTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansDisclosuresTable_d717c39e-f158-4e04-8f6b-98335130bea2" xlink:to="loc_us-gaap_RetirementPlanTypeAxis_1d3f4826-1441-4cfb-9cbd-7df474e7532b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_1d3f4826-1441-4cfb-9cbd-7df474e7532b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_1d3f4826-1441-4cfb-9cbd-7df474e7532b" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_1d3f4826-1441-4cfb-9cbd-7df474e7532b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetirementPlanTypeDomain_d70024d8-8374-4a63-ac44-38db0b827300" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetirementPlanTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_RetirementPlanTypeAxis_1d3f4826-1441-4cfb-9cbd-7df474e7532b" xlink:to="loc_us-gaap_RetirementPlanTypeDomain_d70024d8-8374-4a63-ac44-38db0b827300" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionPlansDefinedBenefitMember_3627ee27-56f7-470a-9c61-fab6a4084644" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PensionPlansDefinedBenefitMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RetirementPlanTypeDomain_d70024d8-8374-4a63-ac44-38db0b827300" xlink:to="loc_us-gaap_PensionPlansDefinedBenefitMember_3627ee27-56f7-470a-9c61-fab6a4084644" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_DefinedBenefitPlanConsecutiveMonthswithHighestCompensationinwhichBenefitsareBased_94336245-5839-4873-b027-e8c17fc392d1" xlink:href="fnf-20231231.xsd#fnf_DefinedBenefitPlanConsecutiveMonthswithHighestCompensationinwhichBenefitsareBased"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_3f64dffb-1aca-494f-a3af-e0abd3eec3bc" xlink:to="loc_fnf_DefinedBenefitPlanConsecutiveMonthswithHighestCompensationinwhichBenefitsareBased_94336245-5839-4873-b027-e8c17fc392d1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_DefinedBenefitPlanMonthsEndingatRetirementorTerminationinwhichBenefitsareBased_a4a91f52-5931-41a9-8327-836a13cce7d8" xlink:href="fnf-20231231.xsd#fnf_DefinedBenefitPlanMonthsEndingatRetirementorTerminationinwhichBenefitsareBased"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_3f64dffb-1aca-494f-a3af-e0abd3eec3bc" xlink:to="loc_fnf_DefinedBenefitPlanMonthsEndingatRetirementorTerminationinwhichBenefitsareBased_a4a91f52-5931-41a9-8327-836a13cce7d8" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_34d2c60f-093f-44a6-ae9d-20ac84776d55" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_3f64dffb-1aca-494f-a3af-e0abd3eec3bc" xlink:to="loc_us-gaap_DefinedBenefitPlanAssumptionsUsedCalculatingBenefitObligationDiscountRate_34d2c60f-093f-44a6-ae9d-20ac84776d55" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanBenefitObligation_ab8c3394-5de0-4c1b-9690-cbc65323f3e5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanBenefitObligation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_3f64dffb-1aca-494f-a3af-e0abd3eec3bc" xlink:to="loc_us-gaap_DefinedBenefitPlanBenefitObligation_ab8c3394-5de0-4c1b-9690-cbc65323f3e5" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_c69c37cd-4aa6-40f4-a041-291486d0ed89" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DefinedBenefitPlanFairValueOfPlanAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTableTextBlockLineItems_3f64dffb-1aca-494f-a3af-e0abd3eec3bc" xlink:to="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_c69c37cd-4aa6-40f4-a041-291486d0ed89" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/FinancialInstrumentswithOffBalanceSheetRiskandConcentrationofRiskDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#FinancialInstrumentswithOffBalanceSheetRiskandConcentrationofRiskDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/FinancialInstrumentswithOffBalanceSheetRiskandConcentrationofRiskDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskLineItems_bf7bb02c-742c-40f3-8a7d-6f98d323fb37" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ConcentrationRiskLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTable_df40243e-e8c9-4f2c-9996-79dad51e7d44" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ConcentrationRiskTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_bf7bb02c-742c-40f3-8a7d-6f98d323fb37" xlink:to="loc_us-gaap_ConcentrationRiskTable_df40243e-e8c9-4f2c-9996-79dad51e7d44" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByTypeAxis_bde77418-d95e-4dce-8286-82ec7e2300b4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ConcentrationRiskByTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_df40243e-e8c9-4f2c-9996-79dad51e7d44" xlink:to="loc_us-gaap_ConcentrationRiskByTypeAxis_bde77418-d95e-4dce-8286-82ec7e2300b4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_bde77418-d95e-4dce-8286-82ec7e2300b4_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_bde77418-d95e-4dce-8286-82ec7e2300b4" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_bde77418-d95e-4dce-8286-82ec7e2300b4_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskTypeDomain_92955930-cf71-48b3-86de-255a17580398" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ConcentrationRiskTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByTypeAxis_bde77418-d95e-4dce-8286-82ec7e2300b4" xlink:to="loc_us-gaap_ConcentrationRiskTypeDomain_92955930-cf71-48b3-86de-255a17580398" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeographicConcentrationRiskMember_5025dd46-bfba-416b-b02a-9370d4545b22" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GeographicConcentrationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskTypeDomain_92955930-cf71-48b3-86de-255a17580398" xlink:to="loc_us-gaap_GeographicConcentrationRiskMember_5025dd46-bfba-416b-b02a-9370d4545b22" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_0a43b5dd-f47c-4f1f-8f8a-8fbe7bc75b93" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_df40243e-e8c9-4f2c-9996-79dad51e7d44" xlink:to="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_0a43b5dd-f47c-4f1f-8f8a-8fbe7bc75b93" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_0a43b5dd-f47c-4f1f-8f8a-8fbe7bc75b93_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_0a43b5dd-f47c-4f1f-8f8a-8fbe7bc75b93" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_0a43b5dd-f47c-4f1f-8f8a-8fbe7bc75b93_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskBenchmarkDomain_61e285f6-fc80-4585-ac32-e05b66345b10" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ConcentrationRiskBenchmarkDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_ConcentrationRiskByBenchmarkAxis_0a43b5dd-f47c-4f1f-8f8a-8fbe7bc75b93" xlink:to="loc_us-gaap_ConcentrationRiskBenchmarkDomain_61e285f6-fc80-4585-ac32-e05b66345b10" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_TitleInsurancePremiumsMember_6379292f-00a6-453c-bbb3-c9b362ba2802" xlink:href="fnf-20231231.xsd#fnf_TitleInsurancePremiumsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskBenchmarkDomain_61e285f6-fc80-4585-ac32-e05b66345b10" xlink:to="loc_fnf_TitleInsurancePremiumsMember_6379292f-00a6-453c-bbb3-c9b362ba2802" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_StatementGeographicalAxis_2237117f-3a24-46c7-8a23-6895e92fa547" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_StatementGeographicalAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_ConcentrationRiskTable_df40243e-e8c9-4f2c-9996-79dad51e7d44" xlink:to="loc_srt_StatementGeographicalAxis_2237117f-3a24-46c7-8a23-6895e92fa547" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_2237117f-3a24-46c7-8a23-6895e92fa547_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_StatementGeographicalAxis_2237117f-3a24-46c7-8a23-6895e92fa547" xlink:to="loc_srt_SegmentGeographicalDomain_2237117f-3a24-46c7-8a23-6895e92fa547_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_SegmentGeographicalDomain_a52baac0-ea76-4007-9299-291249be25a7" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_SegmentGeographicalDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_StatementGeographicalAxis_2237117f-3a24-46c7-8a23-6895e92fa547" xlink:to="loc_srt_SegmentGeographicalDomain_a52baac0-ea76-4007-9299-291249be25a7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_stpr_TX_06a37438-c982-4219-b7f0-7607a57920fd" xlink:href="https://xbrl.sec.gov/stpr/2023/stpr-2023.xsd#stpr_TX"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_a52baac0-ea76-4007-9299-291249be25a7" xlink:to="loc_stpr_TX_06a37438-c982-4219-b7f0-7607a57920fd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_stpr_CA_2b9c6cfd-e41a-46be-9449-b403c127097b" xlink:href="https://xbrl.sec.gov/stpr/2023/stpr-2023.xsd#stpr_CA"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_a52baac0-ea76-4007-9299-291249be25a7" xlink:to="loc_stpr_CA_2b9c6cfd-e41a-46be-9449-b403c127097b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_stpr_FL_5aec5ce1-0f46-4ca8-83e7-7e8a66ae1cc3" xlink:href="https://xbrl.sec.gov/stpr/2023/stpr-2023.xsd#stpr_FL"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_a52baac0-ea76-4007-9299-291249be25a7" xlink:to="loc_stpr_FL_5aec5ce1-0f46-4ca8-83e7-7e8a66ae1cc3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_stpr_IL_cea88b9c-5440-4d46-85cb-0a9064cb05c3" xlink:href="https://xbrl.sec.gov/stpr/2023/stpr-2023.xsd#stpr_IL"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_a52baac0-ea76-4007-9299-291249be25a7" xlink:to="loc_stpr_IL_cea88b9c-5440-4d46-85cb-0a9064cb05c3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_stpr_PA_8160736e-d087-4af4-a752-67d1ab4fdf37" xlink:href="https://xbrl.sec.gov/stpr/2023/stpr-2023.xsd#stpr_PA"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_SegmentGeographicalDomain_a52baac0-ea76-4007-9299-291249be25a7" xlink:to="loc_stpr_PA_8160736e-d087-4af4-a752-67d1ab4fdf37" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_421f5c81-4394-4a58-942d-fa5ae7a22d5c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ConcentrationRiskPercentage1"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ConcentrationRiskLineItems_bf7bb02c-742c-40f3-8a7d-6f98d323fb37" xlink:to="loc_us-gaap_ConcentrationRiskPercentage1_421f5c81-4394-4a58-942d-fa5ae7a22d5c" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/RecentAccountingPronouncementsASU201812TransitionNarrativeDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#RecentAccountingPronouncementsASU201812TransitionNarrativeDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/RecentAccountingPronouncementsASU201812TransitionNarrativeDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_5509b1db-fd95-4703-929b-8ceaecb9604e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_d961e2ce-b79b-46e4-a80f-1ad6dd31ad3f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_5509b1db-fd95-4703-929b-8ceaecb9604e" xlink:to="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_d961e2ce-b79b-46e4-a80f-1ad6dd31ad3f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_e892473b-2c12-4864-b40f-bf2aa5368976" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_CumulativeEffectPeriodOfAdoptionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_d961e2ce-b79b-46e4-a80f-1ad6dd31ad3f" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_e892473b-2c12-4864-b40f-bf2aa5368976" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_e892473b-2c12-4864-b40f-bf2aa5368976_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_e892473b-2c12-4864-b40f-bf2aa5368976" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_e892473b-2c12-4864-b40f-bf2aa5368976_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_b9609396-31e1-4fa0-91f5-f6b80211f357" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_e892473b-2c12-4864-b40f-bf2aa5368976" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_b9609396-31e1-4fa0-91f5-f6b80211f357" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_ea972bb4-5384-4923-ba66-d47c6b749105" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_b9609396-31e1-4fa0-91f5-f6b80211f357" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_ea972bb4-5384-4923-ba66-d47c6b749105" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_202ca110-d742-4d95-a856-ba783c46750c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_d961e2ce-b79b-46e4-a80f-1ad6dd31ad3f" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_202ca110-d742-4d95-a856-ba783c46750c" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_202ca110-d742-4d95-a856-ba783c46750c_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_202ca110-d742-4d95-a856-ba783c46750c" xlink:to="loc_us-gaap_EquityComponentDomain_202ca110-d742-4d95-a856-ba783c46750c_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_bd201435-7f75-4c03-80fc-c99b39535d03" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_202ca110-d742-4d95-a856-ba783c46750c" xlink:to="loc_us-gaap_EquityComponentDomain_bd201435-7f75-4c03-80fc-c99b39535d03" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_c921bfe0-1f43-45a0-94e9-2bceb75564db" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_bd201435-7f75-4c03-80fc-c99b39535d03" xlink:to="loc_us-gaap_RetainedEarningsMember_c921bfe0-1f43-45a0-94e9-2bceb75564db" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_a21ddbe7-3e7d-41e4-bb9d-4dc9dbaf3a4e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_5509b1db-fd95-4703-929b-8ceaecb9604e" xlink:to="loc_us-gaap_StockholdersEquity_a21ddbe7-3e7d-41e4-bb9d-4dc9dbaf3a4e" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/RecentAccountingPronouncementsSummaryofBalanceofandChangesinFPBduetoAdoptionofASU201812Details" xlink:type="simple" xlink:href="fnf-20231231.xsd#RecentAccountingPronouncementsSummaryofBalanceofandChangesinFPBduetoAdoptionofASU201812Details"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/RecentAccountingPronouncementsSummaryofBalanceofandChangesinFPBduetoAdoptionofASU201812Details" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_e336b6a6-4c00-4111-967a-27ddd5b655f1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_4d1c9572-afd0-462e-aa38-d93fbb4f1002" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_e336b6a6-4c00-4111-967a-27ddd5b655f1" xlink:to="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_4d1c9572-afd0-462e-aa38-d93fbb4f1002" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_e2d933cf-4bbe-4731-816b-cb98eae3283e" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_4d1c9572-afd0-462e-aa38-d93fbb4f1002" xlink:to="loc_srt_ProductOrServiceAxis_e2d933cf-4bbe-4731-816b-cb98eae3283e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_e2d933cf-4bbe-4731-816b-cb98eae3283e_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_e2d933cf-4bbe-4731-816b-cb98eae3283e" xlink:to="loc_srt_ProductsAndServicesDomain_e2d933cf-4bbe-4731-816b-cb98eae3283e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_7b1195be-b25b-4c70-93b0-4e78cde96fcf" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_e2d933cf-4bbe-4731-816b-cb98eae3283e" xlink:to="loc_srt_ProductsAndServicesDomain_7b1195be-b25b-4c70-93b0-4e78cde96fcf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_ImmediateAnnuityMember_0014df29-e138-4e49-89f1-f5f4fe2315f9" xlink:href="fnf-20231231.xsd#fnf_ImmediateAnnuityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_7b1195be-b25b-4c70-93b0-4e78cde96fcf" xlink:to="loc_fnf_ImmediateAnnuityMember_0014df29-e138-4e49-89f1-f5f4fe2315f9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_TraditionalLifeInsuranceMember_13e2ad55-9033-485b-82bf-286fe49eaad6" xlink:href="fnf-20231231.xsd#fnf_TraditionalLifeInsuranceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_7b1195be-b25b-4c70-93b0-4e78cde96fcf" xlink:to="loc_fnf_TraditionalLifeInsuranceMember_13e2ad55-9033-485b-82bf-286fe49eaad6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementAxis_bb14537a-1f75-4edd-b2b5-08e7e0b688e9" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RestatementAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_4d1c9572-afd0-462e-aa38-d93fbb4f1002" xlink:to="loc_srt_RestatementAxis_bb14537a-1f75-4edd-b2b5-08e7e0b688e9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementDomain_bb14537a-1f75-4edd-b2b5-08e7e0b688e9_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RestatementDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RestatementAxis_bb14537a-1f75-4edd-b2b5-08e7e0b688e9" xlink:to="loc_srt_RestatementDomain_bb14537a-1f75-4edd-b2b5-08e7e0b688e9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementDomain_1f304a07-fc8a-446f-a5eb-dda017fad382" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RestatementDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RestatementAxis_bb14537a-1f75-4edd-b2b5-08e7e0b688e9" xlink:to="loc_srt_RestatementDomain_1f304a07-fc8a-446f-a5eb-dda017fad382" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioPreviouslyReportedMember_11b7a1bc-e1d1-49aa-a226-ff4efd4fec48" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ScenarioPreviouslyReportedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RestatementDomain_1f304a07-fc8a-446f-a5eb-dda017fad382" xlink:to="loc_srt_ScenarioPreviouslyReportedMember_11b7a1bc-e1d1-49aa-a226-ff4efd4fec48" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_EffectOfApplicationOfAccountingStandardsUpdate201812AdjustmentsForTheRemovalOfShadowAdjustmentsMember_315c722b-135d-478e-bb5a-80833707a172" xlink:href="fnf-20231231.xsd#fnf_EffectOfApplicationOfAccountingStandardsUpdate201812AdjustmentsForTheRemovalOfShadowAdjustmentsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RestatementDomain_1f304a07-fc8a-446f-a5eb-dda017fad382" xlink:to="loc_fnf_EffectOfApplicationOfAccountingStandardsUpdate201812AdjustmentsForTheRemovalOfShadowAdjustmentsMember_315c722b-135d-478e-bb5a-80833707a172" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_EffectOfApplicationOfAccountingStandardsUpdate201812CumulativeEffectOfChangesInInstrumentSpecificCreditRiskMember_f30abb11-5e6f-4ad9-b2f3-bb012f0ab54e" xlink:href="fnf-20231231.xsd#fnf_EffectOfApplicationOfAccountingStandardsUpdate201812CumulativeEffectOfChangesInInstrumentSpecificCreditRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RestatementDomain_1f304a07-fc8a-446f-a5eb-dda017fad382" xlink:to="loc_fnf_EffectOfApplicationOfAccountingStandardsUpdate201812CumulativeEffectOfChangesInInstrumentSpecificCreditRiskMember_f30abb11-5e6f-4ad9-b2f3-bb012f0ab54e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_9b656206-edb0-4578-a140-b2a119399aac" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_CumulativeEffectPeriodOfAdoptionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_4d1c9572-afd0-462e-aa38-d93fbb4f1002" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_9b656206-edb0-4578-a140-b2a119399aac" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_9b656206-edb0-4578-a140-b2a119399aac_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_9b656206-edb0-4578-a140-b2a119399aac" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_9b656206-edb0-4578-a140-b2a119399aac_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_2f574749-789f-4bf9-82ec-981423f31e44" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_9b656206-edb0-4578-a140-b2a119399aac" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_2f574749-789f-4bf9-82ec-981423f31e44" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember_e8a672a9-f5f6-4bfd-9504-4b5a568ca583" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_2f574749-789f-4bf9-82ec-981423f31e44" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember_e8a672a9-f5f6-4bfd-9504-4b5a568ca583" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_LiabilityForFuturePolicyBenefitExpectedNetPremiumExpectedFuturePolicyBenefitsBeforeReinsuranceAfterDiscountRateChangeAndDeferredProfitLiability_cdbe3e54-2b04-48c4-8817-a733f56a8fc7" xlink:href="fnf-20231231.xsd#fnf_LiabilityForFuturePolicyBenefitExpectedNetPremiumExpectedFuturePolicyBenefitsBeforeReinsuranceAfterDiscountRateChangeAndDeferredProfitLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_e336b6a6-4c00-4111-967a-27ddd5b655f1" xlink:to="loc_fnf_LiabilityForFuturePolicyBenefitExpectedNetPremiumExpectedFuturePolicyBenefitsBeforeReinsuranceAfterDiscountRateChangeAndDeferredProfitLiability_cdbe3e54-2b04-48c4-8817-a733f56a8fc7" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitReinsuranceRecoverableAfterAllowance_f2e087a6-b8c1-4b1b-8682-c9464f41a819" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefitReinsuranceRecoverableAfterAllowance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_e336b6a6-4c00-4111-967a-27ddd5b655f1" xlink:to="loc_us-gaap_LiabilityForFuturePolicyBenefitReinsuranceRecoverableAfterAllowance_f2e087a6-b8c1-4b1b-8682-c9464f41a819" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_LiabilityForFuturePolicyBenefitExpectedNetPremiumExpectedFuturePolicyBenefitsAfterReinsuranceAfterDiscountRateChangeAndDeferredProfitLiability_c1a83146-d854-4a54-9682-439cbd9aa61c" xlink:href="fnf-20231231.xsd#fnf_LiabilityForFuturePolicyBenefitExpectedNetPremiumExpectedFuturePolicyBenefitsAfterReinsuranceAfterDiscountRateChangeAndDeferredProfitLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_e336b6a6-4c00-4111-967a-27ddd5b655f1" xlink:to="loc_fnf_LiabilityForFuturePolicyBenefitExpectedNetPremiumExpectedFuturePolicyBenefitsAfterReinsuranceAfterDiscountRateChangeAndDeferredProfitLiability_c1a83146-d854-4a54-9682-439cbd9aa61c" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/RecentAccountingPronouncementsSummaryofBalanceofandChangesinVOBADACDSIandURLduetoAdoptionofASU201812Details" xlink:type="simple" xlink:href="fnf-20231231.xsd#RecentAccountingPronouncementsSummaryofBalanceofandChangesinVOBADACDSIandURLduetoAdoptionofASU201812Details"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/RecentAccountingPronouncementsSummaryofBalanceofandChangesinVOBADACDSIandURLduetoAdoptionofASU201812Details" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_841b2570-37ee-474d-855c-5c29e97333a2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_0c9b2981-d783-4bb6-bdde-8c89203c0725" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_841b2570-37ee-474d-855c-5c29e97333a2" xlink:to="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_0c9b2981-d783-4bb6-bdde-8c89203c0725" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_f48d0df1-61e7-4351-a15a-d830e1234068" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_CumulativeEffectPeriodOfAdoptionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_0c9b2981-d783-4bb6-bdde-8c89203c0725" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_f48d0df1-61e7-4351-a15a-d830e1234068" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_f48d0df1-61e7-4351-a15a-d830e1234068_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_f48d0df1-61e7-4351-a15a-d830e1234068" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_f48d0df1-61e7-4351-a15a-d830e1234068_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_10d4594a-0f7d-484b-8bf0-0d799714ff29" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_f48d0df1-61e7-4351-a15a-d830e1234068" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_10d4594a-0f7d-484b-8bf0-0d799714ff29" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_c6bc831f-957b-470c-82aa-030b6b399c34" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_10d4594a-0f7d-484b-8bf0-0d799714ff29" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_c6bc831f-957b-470c-82aa-030b6b399c34" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember_111951fb-eba8-4cca-a704-31087d927009" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_10d4594a-0f7d-484b-8bf0-0d799714ff29" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember_111951fb-eba8-4cca-a704-31087d927009" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementAxis_73476b01-30fc-4ffa-a7cc-aa6626b936ff" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RestatementAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_0c9b2981-d783-4bb6-bdde-8c89203c0725" xlink:to="loc_srt_RestatementAxis_73476b01-30fc-4ffa-a7cc-aa6626b936ff" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementDomain_73476b01-30fc-4ffa-a7cc-aa6626b936ff_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RestatementDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RestatementAxis_73476b01-30fc-4ffa-a7cc-aa6626b936ff" xlink:to="loc_srt_RestatementDomain_73476b01-30fc-4ffa-a7cc-aa6626b936ff_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementDomain_0667508b-3643-497e-a3e5-6f3f428d138a" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RestatementDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RestatementAxis_73476b01-30fc-4ffa-a7cc-aa6626b936ff" xlink:to="loc_srt_RestatementDomain_0667508b-3643-497e-a3e5-6f3f428d138a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioPreviouslyReportedMember_1decc514-0897-4ba6-81d0-cd0546cd07f2" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ScenarioPreviouslyReportedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RestatementDomain_0667508b-3643-497e-a3e5-6f3f428d138a" xlink:to="loc_srt_ScenarioPreviouslyReportedMember_1decc514-0897-4ba6-81d0-cd0546cd07f2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RevisionOfPriorPeriodAccountingStandardsUpdateAdjustmentMember_768777c2-a658-4fe1-9c94-706c10eb955e" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RevisionOfPriorPeriodAccountingStandardsUpdateAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RestatementDomain_0667508b-3643-497e-a3e5-6f3f428d138a" xlink:to="loc_srt_RevisionOfPriorPeriodAccountingStandardsUpdateAdjustmentMember_768777c2-a658-4fe1-9c94-706c10eb955e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementAdjustmentMember_9a45c107-fe17-4fcd-bf19-1da17530d6ca" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RestatementAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RestatementDomain_0667508b-3643-497e-a3e5-6f3f428d138a" xlink:to="loc_srt_RestatementAdjustmentMember_9a45c107-fe17-4fcd-bf19-1da17530d6ca" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_d38bc8a4-9d94-4bf9-9add-3e7418ce2f1b" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_0c9b2981-d783-4bb6-bdde-8c89203c0725" xlink:to="loc_srt_ProductOrServiceAxis_d38bc8a4-9d94-4bf9-9add-3e7418ce2f1b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_d38bc8a4-9d94-4bf9-9add-3e7418ce2f1b_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_d38bc8a4-9d94-4bf9-9add-3e7418ce2f1b" xlink:to="loc_srt_ProductsAndServicesDomain_d38bc8a4-9d94-4bf9-9add-3e7418ce2f1b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_db317c8f-b065-489a-887e-407251bb6673" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_d38bc8a4-9d94-4bf9-9add-3e7418ce2f1b" xlink:to="loc_srt_ProductsAndServicesDomain_db317c8f-b065-489a-887e-407251bb6673" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_ImmediateAnnuityMember_34e95fa6-1d52-4ebc-a179-62771a4854ad" xlink:href="fnf-20231231.xsd#fnf_ImmediateAnnuityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_db317c8f-b065-489a-887e-407251bb6673" xlink:to="loc_fnf_ImmediateAnnuityMember_34e95fa6-1d52-4ebc-a179-62771a4854ad" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_TraditionalLifeInsuranceMember_94326304-d59c-469e-b991-e71fe87a9517" xlink:href="fnf-20231231.xsd#fnf_TraditionalLifeInsuranceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_db317c8f-b065-489a-887e-407251bb6673" xlink:to="loc_fnf_TraditionalLifeInsuranceMember_94326304-d59c-469e-b991-e71fe87a9517" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FixedIndexAnnuityMember_bb5109ba-a16f-49d4-863f-b4661e9325f9" xlink:href="fnf-20231231.xsd#fnf_FixedIndexAnnuityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_db317c8f-b065-489a-887e-407251bb6673" xlink:to="loc_fnf_FixedIndexAnnuityMember_bb5109ba-a16f-49d4-863f-b4661e9325f9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FixedAnnuityMember_b856f6f0-375f-4e47-8a2f-a01ed556c7ad" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FixedAnnuityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_db317c8f-b065-489a-887e-407251bb6673" xlink:to="loc_us-gaap_FixedAnnuityMember_b856f6f0-375f-4e47-8a2f-a01ed556c7ad" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UniversalLifeMember_f05e3617-0ea6-4fde-8802-7c997cb82aee" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UniversalLifeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_db317c8f-b065-489a-887e-407251bb6673" xlink:to="loc_us-gaap_UniversalLifeMember_f05e3617-0ea6-4fde-8802-7c997cb82aee" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValueOfBusinessAcquiredVOBA_b70f1faa-bfd5-44e4-adde-789f0e4b823f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ValueOfBusinessAcquiredVOBA"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_841b2570-37ee-474d-855c-5c29e97333a2" xlink:to="loc_us-gaap_ValueOfBusinessAcquiredVOBA_b70f1faa-bfd5-44e4-adde-789f0e4b823f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredPolicyAcquisitionCosts_0d685a46-5aa9-4524-b282-9b34fcdad405" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredPolicyAcquisitionCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_841b2570-37ee-474d-855c-5c29e97333a2" xlink:to="loc_us-gaap_DeferredPolicyAcquisitionCosts_0d685a46-5aa9-4524-b282-9b34fcdad405" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredSalesInducementsNet_4936efd5-fd7e-4d0d-81a0-bcd3745b95b8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredSalesInducementsNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_841b2570-37ee-474d-855c-5c29e97333a2" xlink:to="loc_us-gaap_DeferredSalesInducementsNet_4936efd5-fd7e-4d0d-81a0-bcd3745b95b8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiability_13681eb7-325a-4c58-b350-174bfefc1a31" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ContractWithCustomerLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_841b2570-37ee-474d-855c-5c29e97333a2" xlink:to="loc_us-gaap_ContractWithCustomerLiability_13681eb7-325a-4c58-b350-174bfefc1a31" xlink:type="arc" order="3"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/RecentAccountingPronouncementsSummaryofBalanceofandChangesinAssetsandLiabilityPositionforMRBsduetoASU201812TransitionDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#RecentAccountingPronouncementsSummaryofBalanceofandChangesinAssetsandLiabilityPositionforMRBsduetoASU201812TransitionDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/RecentAccountingPronouncementsSummaryofBalanceofandChangesinAssetsandLiabilityPositionforMRBsduetoASU201812TransitionDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_6a864215-4c2e-470e-9692-5c85cfe2f73f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_8ef98612-25ad-43a4-b911-4731aebf9445" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_6a864215-4c2e-470e-9692-5c85cfe2f73f" xlink:to="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_8ef98612-25ad-43a4-b911-4731aebf9445" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_c2afdc2c-7d45-47f1-baec-776e188fca5d" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_CumulativeEffectPeriodOfAdoptionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_8ef98612-25ad-43a4-b911-4731aebf9445" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_c2afdc2c-7d45-47f1-baec-776e188fca5d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_c2afdc2c-7d45-47f1-baec-776e188fca5d_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_c2afdc2c-7d45-47f1-baec-776e188fca5d" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_c2afdc2c-7d45-47f1-baec-776e188fca5d_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_daabb4d9-aa49-41fc-8bbf-1f5cb316730a" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_c2afdc2c-7d45-47f1-baec-776e188fca5d" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_daabb4d9-aa49-41fc-8bbf-1f5cb316730a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_10c92bbf-18da-4ff8-8596-d8796725f2a1" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_daabb4d9-aa49-41fc-8bbf-1f5cb316730a" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_10c92bbf-18da-4ff8-8596-d8796725f2a1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember_be1a5a92-8ccc-4e7a-8ccb-0ea12435004a" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_daabb4d9-aa49-41fc-8bbf-1f5cb316730a" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustedBalanceMember_be1a5a92-8ccc-4e7a-8ccb-0ea12435004a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementAxis_aadaa51b-2f47-403d-8198-8c64e7d55af9" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RestatementAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_8ef98612-25ad-43a4-b911-4731aebf9445" xlink:to="loc_srt_RestatementAxis_aadaa51b-2f47-403d-8198-8c64e7d55af9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementDomain_aadaa51b-2f47-403d-8198-8c64e7d55af9_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RestatementDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RestatementAxis_aadaa51b-2f47-403d-8198-8c64e7d55af9" xlink:to="loc_srt_RestatementDomain_aadaa51b-2f47-403d-8198-8c64e7d55af9_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementDomain_36328603-cfff-40b1-915a-ce9941c6069a" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RestatementDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RestatementAxis_aadaa51b-2f47-403d-8198-8c64e7d55af9" xlink:to="loc_srt_RestatementDomain_36328603-cfff-40b1-915a-ce9941c6069a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioPreviouslyReportedMember_404c1f37-3fa5-4c3a-8e4b-1998bac1da91" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ScenarioPreviouslyReportedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RestatementDomain_36328603-cfff-40b1-915a-ce9941c6069a" xlink:to="loc_srt_ScenarioPreviouslyReportedMember_404c1f37-3fa5-4c3a-8e4b-1998bac1da91" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RevisionOfPriorPeriodAccountingStandardsUpdateAdjustmentMember_80b83ac6-c092-4417-bcc5-c0ec1ebd3913" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RevisionOfPriorPeriodAccountingStandardsUpdateAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RestatementDomain_36328603-cfff-40b1-915a-ce9941c6069a" xlink:to="loc_srt_RevisionOfPriorPeriodAccountingStandardsUpdateAdjustmentMember_80b83ac6-c092-4417-bcc5-c0ec1ebd3913" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_EffectOfApplicationOfAccountingStandardsUpdate201812AdjustmentsForRemainingDifferenceBetweenCarryingAmountAndFairValueForMRBMember_d2ea170d-c57e-44e7-9fee-c906b8904a96" xlink:href="fnf-20231231.xsd#fnf_EffectOfApplicationOfAccountingStandardsUpdate201812AdjustmentsForRemainingDifferenceBetweenCarryingAmountAndFairValueForMRBMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RestatementDomain_36328603-cfff-40b1-915a-ce9941c6069a" xlink:to="loc_fnf_EffectOfApplicationOfAccountingStandardsUpdate201812AdjustmentsForRemainingDifferenceBetweenCarryingAmountAndFairValueForMRBMember_d2ea170d-c57e-44e7-9fee-c906b8904a96" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_456d3960-b0b8-43a3-a07d-ccf261efbf1f" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_8ef98612-25ad-43a4-b911-4731aebf9445" xlink:to="loc_srt_ProductOrServiceAxis_456d3960-b0b8-43a3-a07d-ccf261efbf1f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_456d3960-b0b8-43a3-a07d-ccf261efbf1f_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_456d3960-b0b8-43a3-a07d-ccf261efbf1f" xlink:to="loc_srt_ProductsAndServicesDomain_456d3960-b0b8-43a3-a07d-ccf261efbf1f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_43043603-6c27-4361-b378-5ff523d25e0e" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_456d3960-b0b8-43a3-a07d-ccf261efbf1f" xlink:to="loc_srt_ProductsAndServicesDomain_43043603-6c27-4361-b378-5ff523d25e0e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FixedIndexAnnuityMember_3c200c05-0867-4b67-a6c1-51435f82ecd0" xlink:href="fnf-20231231.xsd#fnf_FixedIndexAnnuityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_43043603-6c27-4361-b378-5ff523d25e0e" xlink:to="loc_fnf_FixedIndexAnnuityMember_3c200c05-0867-4b67-a6c1-51435f82ecd0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FixedAnnuityMember_6f307fbd-3d92-4dce-b8db-d39a05e327de" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FixedAnnuityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_43043603-6c27-4361-b378-5ff523d25e0e" xlink:to="loc_us-gaap_FixedAnnuityMember_6f307fbd-3d92-4dce-b8db-d39a05e327de" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketRiskBenefitAfterIncreaseDecreaseFromInstrumentSpecificCreditRisk_8a9e243d-3305-44fa-8b7d-323f7d701eeb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MarketRiskBenefitAfterIncreaseDecreaseFromInstrumentSpecificCreditRisk"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_6a864215-4c2e-470e-9692-5c85cfe2f73f" xlink:to="loc_us-gaap_MarketRiskBenefitAfterIncreaseDecreaseFromInstrumentSpecificCreditRisk_8a9e243d-3305-44fa-8b7d-323f7d701eeb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketRiskBenefitReinsuranceRecoverableAfterAllowance_1c82a47c-555c-4f96-b437-dba6a586f412" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MarketRiskBenefitReinsuranceRecoverableAfterAllowance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_6a864215-4c2e-470e-9692-5c85cfe2f73f" xlink:to="loc_us-gaap_MarketRiskBenefitReinsuranceRecoverableAfterAllowance_1c82a47c-555c-4f96-b437-dba6a586f412" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketRiskBenefitAfterReinsuranceAndCumulativeIncreaseDecreaseFromInstrumentSpecificCreditRiskChange_f263495f-3a31-4738-a3e4-384ee3a9444f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MarketRiskBenefitAfterReinsuranceAndCumulativeIncreaseDecreaseFromInstrumentSpecificCreditRiskChange"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_6a864215-4c2e-470e-9692-5c85cfe2f73f" xlink:to="loc_us-gaap_MarketRiskBenefitAfterReinsuranceAndCumulativeIncreaseDecreaseFromInstrumentSpecificCreditRiskChange_f263495f-3a31-4738-a3e4-384ee3a9444f" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/RecentAccountingPronouncementsEffectofTransitionAdjustmentsonEquityduetoASU201812Details" xlink:type="simple" xlink:href="fnf-20231231.xsd#RecentAccountingPronouncementsEffectofTransitionAdjustmentsonEquityduetoASU201812Details"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/RecentAccountingPronouncementsEffectofTransitionAdjustmentsonEquityduetoASU201812Details" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_667dcc02-16e5-41a2-82f8-760f06459611" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_8d85bd17-f76b-4fac-b892-d590c9c5ef7d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_667dcc02-16e5-41a2-82f8-760f06459611" xlink:to="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_8d85bd17-f76b-4fac-b892-d590c9c5ef7d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_9933b5ab-25a8-4407-8ad8-54868e0e69d0" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_CumulativeEffectPeriodOfAdoptionAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_8d85bd17-f76b-4fac-b892-d590c9c5ef7d" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_9933b5ab-25a8-4407-8ad8-54868e0e69d0" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_9933b5ab-25a8-4407-8ad8-54868e0e69d0_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_9933b5ab-25a8-4407-8ad8-54868e0e69d0" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_9933b5ab-25a8-4407-8ad8-54868e0e69d0_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_a56fd3bb-2460-4c87-a50d-9b1316041bb1" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_CumulativeEffectPeriodOfAdoptionDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionAxis_9933b5ab-25a8-4407-8ad8-54868e0e69d0" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_a56fd3bb-2460-4c87-a50d-9b1316041bb1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_2221886b-5b01-4a13-b853-46fdadf6f508" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CumulativeEffectPeriodOfAdoptionDomain_a56fd3bb-2460-4c87-a50d-9b1316041bb1" xlink:to="loc_srt_CumulativeEffectPeriodOfAdoptionAdjustmentMember_2221886b-5b01-4a13-b853-46fdadf6f508" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_fe249b35-a73e-4bc5-9b27-4e84634510ab" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleTable_8d85bd17-f76b-4fac-b892-d590c9c5ef7d" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_fe249b35-a73e-4bc5-9b27-4e84634510ab" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_fe249b35-a73e-4bc5-9b27-4e84634510ab_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_fe249b35-a73e-4bc5-9b27-4e84634510ab" xlink:to="loc_us-gaap_EquityComponentDomain_fe249b35-a73e-4bc5-9b27-4e84634510ab_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_70ad8305-8cda-4c75-ae75-39fcca60b4d2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_fe249b35-a73e-4bc5-9b27-4e84634510ab" xlink:to="loc_us-gaap_EquityComponentDomain_70ad8305-8cda-4c75-ae75-39fcca60b4d2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_3de7b2f0-9100-4892-b3c2-2cb94fed9cea" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_70ad8305-8cda-4c75-ae75-39fcca60b4d2" xlink:to="loc_us-gaap_RetainedEarningsMember_3de7b2f0-9100-4892-b3c2-2cb94fed9cea" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_ec5024df-d129-424f-b315-328aa865f241" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_70ad8305-8cda-4c75-ae75-39fcca60b4d2" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeMember_ec5024df-d129-424f-b315-328aa865f241" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PolicyholderFunds_a7805582-fc18-46a8-9cd3-f8fb94fb5b48" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PolicyholderFunds"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_667dcc02-16e5-41a2-82f8-760f06459611" xlink:to="loc_us-gaap_PolicyholderFunds_a7805582-fc18-46a8-9cd3-f8fb94fb5b48" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketRiskBenefitAfterIncreaseDecreaseFromInstrumentSpecificCreditRisk_44790a9d-46cc-4795-8426-687ab32783ea" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MarketRiskBenefitAfterIncreaseDecreaseFromInstrumentSpecificCreditRisk"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_667dcc02-16e5-41a2-82f8-760f06459611" xlink:to="loc_us-gaap_MarketRiskBenefitAfterIncreaseDecreaseFromInstrumentSpecificCreditRisk_44790a9d-46cc-4795-8426-687ab32783ea" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitAfterReinsurance_6fb9d722-835e-449e-ad40-0b7ae57c018a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefitAfterReinsurance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_667dcc02-16e5-41a2-82f8-760f06459611" xlink:to="loc_us-gaap_LiabilityForFuturePolicyBenefitAfterReinsurance_6fb9d722-835e-449e-ad40-0b7ae57c018a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ValueOfBusinessAcquiredVOBA_193ecb81-3b5e-4528-811f-b54703c83a2c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ValueOfBusinessAcquiredVOBA"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_667dcc02-16e5-41a2-82f8-760f06459611" xlink:to="loc_us-gaap_ValueOfBusinessAcquiredVOBA_193ecb81-3b5e-4528-811f-b54703c83a2c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredPolicyAcquisitionCosts_9513b925-bcfe-4b71-9626-b5d051eaf78f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredPolicyAcquisitionCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_667dcc02-16e5-41a2-82f8-760f06459611" xlink:to="loc_us-gaap_DeferredPolicyAcquisitionCosts_9513b925-bcfe-4b71-9626-b5d051eaf78f" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_StockholdersEquityPeriodIncreaseDecreaseBeforeTax_5da84b65-eebf-454d-88fe-630f18ab963e" xlink:href="fnf-20231231.xsd#fnf_StockholdersEquityPeriodIncreaseDecreaseBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_667dcc02-16e5-41a2-82f8-760f06459611" xlink:to="loc_fnf_StockholdersEquityPeriodIncreaseDecreaseBeforeTax_5da84b65-eebf-454d-88fe-630f18ab963e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_b1c179d0-81cb-43d3-9bc5-76da0e214977" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_667dcc02-16e5-41a2-82f8-760f06459611" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_b1c179d0-81cb-43d3-9bc5-76da0e214977" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_99074d86-2b08-4e1a-b0aa-72a283481b96" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NewAccountingPronouncementsOrChangeInAccountingPrincipleLineItems_667dcc02-16e5-41a2-82f8-760f06459611" xlink:to="loc_us-gaap_StockholdersEquity_99074d86-2b08-4e1a-b0aa-72a283481b96" xlink:type="arc" order="7"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/MarketRiskBenefitsBalancesandChangesinMarketRiskBenefitDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#MarketRiskBenefitsBalancesandChangesinMarketRiskBenefitDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/MarketRiskBenefitsBalancesandChangesinMarketRiskBenefitDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketRiskBenefitLineItems_188d835e-905d-436a-93b9-b4f42b0b5bd5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MarketRiskBenefitLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketRiskBenefitTable_7102a242-f259-4b31-960f-cdcbe67a29c4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MarketRiskBenefitTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_MarketRiskBenefitLineItems_188d835e-905d-436a-93b9-b4f42b0b5bd5" xlink:to="loc_us-gaap_MarketRiskBenefitTable_7102a242-f259-4b31-960f-cdcbe67a29c4" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_c30f65f7-24ae-4306-823c-f75583214578" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_MarketRiskBenefitTable_7102a242-f259-4b31-960f-cdcbe67a29c4" xlink:to="loc_srt_ProductOrServiceAxis_c30f65f7-24ae-4306-823c-f75583214578" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_c30f65f7-24ae-4306-823c-f75583214578_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_c30f65f7-24ae-4306-823c-f75583214578" xlink:to="loc_srt_ProductsAndServicesDomain_c30f65f7-24ae-4306-823c-f75583214578_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_dbffe085-ba40-4c1a-98d0-065cf45eb6cc" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_c30f65f7-24ae-4306-823c-f75583214578" xlink:to="loc_srt_ProductsAndServicesDomain_dbffe085-ba40-4c1a-98d0-065cf45eb6cc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FixedIndexAnnuityMember_29bd2811-fcc7-45ce-8084-9010efecc55f" xlink:href="fnf-20231231.xsd#fnf_FixedIndexAnnuityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_dbffe085-ba40-4c1a-98d0-065cf45eb6cc" xlink:to="loc_fnf_FixedIndexAnnuityMember_29bd2811-fcc7-45ce-8084-9010efecc55f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FixedAnnuityMember_da9b75dc-62cd-45b9-9f80-4f41e219e3b9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FixedAnnuityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_dbffe085-ba40-4c1a-98d0-065cf45eb6cc" xlink:to="loc_us-gaap_FixedAnnuityMember_da9b75dc-62cd-45b9-9f80-4f41e219e3b9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementAxis_6222aab6-9873-4bf2-8f19-af17ac0c1006" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RestatementAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_MarketRiskBenefitTable_7102a242-f259-4b31-960f-cdcbe67a29c4" xlink:to="loc_srt_RestatementAxis_6222aab6-9873-4bf2-8f19-af17ac0c1006" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementDomain_6222aab6-9873-4bf2-8f19-af17ac0c1006_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RestatementDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RestatementAxis_6222aab6-9873-4bf2-8f19-af17ac0c1006" xlink:to="loc_srt_RestatementDomain_6222aab6-9873-4bf2-8f19-af17ac0c1006_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RestatementDomain_f41caa03-8b72-4816-b088-4c2bbeb3d987" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RestatementDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RestatementAxis_6222aab6-9873-4bf2-8f19-af17ac0c1006" xlink:to="loc_srt_RestatementDomain_f41caa03-8b72-4816-b088-4c2bbeb3d987" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ScenarioPreviouslyReportedMember_ba706e1a-a580-4f63-992b-c12e651fd3df" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ScenarioPreviouslyReportedMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RestatementDomain_f41caa03-8b72-4816-b088-4c2bbeb3d987" xlink:to="loc_srt_ScenarioPreviouslyReportedMember_ba706e1a-a580-4f63-992b-c12e651fd3df" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketRiskBenefitAfterIncreaseDecreaseFromInstrumentSpecificCreditRisk_b67347d0-10bb-4574-bd9f-e338707e08a6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MarketRiskBenefitAfterIncreaseDecreaseFromInstrumentSpecificCreditRisk"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MarketRiskBenefitLineItems_188d835e-905d-436a-93b9-b4f42b0b5bd5" xlink:to="loc_us-gaap_MarketRiskBenefitAfterIncreaseDecreaseFromInstrumentSpecificCreditRisk_b67347d0-10bb-4574-bd9f-e338707e08a6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketRiskBenefitBeforeReinsuranceAndCumulativeIncreaseDecreaseFromInstrumentSpecificCreditRiskChange_493a8dcf-51d7-4e30-b1bc-432eefcbfe41" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MarketRiskBenefitBeforeReinsuranceAndCumulativeIncreaseDecreaseFromInstrumentSpecificCreditRiskChange"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MarketRiskBenefitLineItems_188d835e-905d-436a-93b9-b4f42b0b5bd5" xlink:to="loc_us-gaap_MarketRiskBenefitBeforeReinsuranceAndCumulativeIncreaseDecreaseFromInstrumentSpecificCreditRiskChange_493a8dcf-51d7-4e30-b1bc-432eefcbfe41" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_MarketRiskBenefitIssuanceAndBenefitPayments_c175202d-65c7-461c-ad2a-3e8f219fdccf" xlink:href="fnf-20231231.xsd#fnf_MarketRiskBenefitIssuanceAndBenefitPayments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MarketRiskBenefitBeforeReinsuranceAndCumulativeIncreaseDecreaseFromInstrumentSpecificCreditRiskChange_493a8dcf-51d7-4e30-b1bc-432eefcbfe41" xlink:to="loc_fnf_MarketRiskBenefitIssuanceAndBenefitPayments_c175202d-65c7-461c-ad2a-3e8f219fdccf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketRiskBenefitAttributedFeeCollected_f2229fa9-f6b3-491a-96e6-f604128ef1b4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MarketRiskBenefitAttributedFeeCollected"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MarketRiskBenefitBeforeReinsuranceAndCumulativeIncreaseDecreaseFromInstrumentSpecificCreditRiskChange_493a8dcf-51d7-4e30-b1bc-432eefcbfe41" xlink:to="loc_us-gaap_MarketRiskBenefitAttributedFeeCollected_f2229fa9-f6b3-491a-96e6-f604128ef1b4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketRiskBenefitIncreaseDecreaseFromActualPolicyholderBehaviorDifferentFromExpected_3f284841-7f85-417e-ad06-c1e435b11f0f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MarketRiskBenefitIncreaseDecreaseFromActualPolicyholderBehaviorDifferentFromExpected"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MarketRiskBenefitBeforeReinsuranceAndCumulativeIncreaseDecreaseFromInstrumentSpecificCreditRiskChange_493a8dcf-51d7-4e30-b1bc-432eefcbfe41" xlink:to="loc_us-gaap_MarketRiskBenefitIncreaseDecreaseFromActualPolicyholderBehaviorDifferentFromExpected_3f284841-7f85-417e-ad06-c1e435b11f0f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketRiskBenefitIncreaseDecreaseFromOtherAssumption_06f1120e-df60-4f73-b644-e63b8abd670d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MarketRiskBenefitIncreaseDecreaseFromOtherAssumption"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MarketRiskBenefitBeforeReinsuranceAndCumulativeIncreaseDecreaseFromInstrumentSpecificCreditRiskChange_493a8dcf-51d7-4e30-b1bc-432eefcbfe41" xlink:to="loc_us-gaap_MarketRiskBenefitIncreaseDecreaseFromOtherAssumption_06f1120e-df60-4f73-b644-e63b8abd670d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketRiskBenefitIncreaseDecreaseFromEquityMarketChange_98ea4463-81a4-4c75-9b38-1d54307e6d4b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MarketRiskBenefitIncreaseDecreaseFromEquityMarketChange"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MarketRiskBenefitBeforeReinsuranceAndCumulativeIncreaseDecreaseFromInstrumentSpecificCreditRiskChange_493a8dcf-51d7-4e30-b1bc-432eefcbfe41" xlink:to="loc_us-gaap_MarketRiskBenefitIncreaseDecreaseFromEquityMarketChange_98ea4463-81a4-4c75-9b38-1d54307e6d4b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketRiskBenefitBeforeReinsuranceAndCumulativeIncreaseDecreaseFromInstrumentSpecificCreditRiskChange_c5f243d2-f559-4344-8681-9d0e511c306f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MarketRiskBenefitBeforeReinsuranceAndCumulativeIncreaseDecreaseFromInstrumentSpecificCreditRiskChange"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AociMarketRiskBenefitInstrumentSpecificCreditRiskBeforeTax_73a73bd9-029c-494a-9b25-c807a3297ac7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AociMarketRiskBenefitInstrumentSpecificCreditRiskBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MarketRiskBenefitLineItems_188d835e-905d-436a-93b9-b4f42b0b5bd5" xlink:to="loc_us-gaap_AociMarketRiskBenefitInstrumentSpecificCreditRiskBeforeTax_73a73bd9-029c-494a-9b25-c807a3297ac7" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketRiskBenefitAfterIncreaseDecreaseFromInstrumentSpecificCreditRisk_a2a3e8d9-ad3f-4743-b423-c9664b1756fb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MarketRiskBenefitAfterIncreaseDecreaseFromInstrumentSpecificCreditRisk"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_NetAmountAtRiskByProductAndGuaranteeWeightedAverageAttainedAgeOfPolicyholdersWeightedByTotalAV_e06c4f95-565f-43fd-a265-a978da9fe79e" xlink:href="fnf-20231231.xsd#fnf_NetAmountAtRiskByProductAndGuaranteeWeightedAverageAttainedAgeOfPolicyholdersWeightedByTotalAV"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MarketRiskBenefitLineItems_188d835e-905d-436a-93b9-b4f42b0b5bd5" xlink:to="loc_fnf_NetAmountAtRiskByProductAndGuaranteeWeightedAverageAttainedAgeOfPolicyholdersWeightedByTotalAV_e06c4f95-565f-43fd-a265-a978da9fe79e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketRiskBenefitNetAmountAtRisk_c66027f7-a728-4fc7-b8f4-29f03f1f8d51" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MarketRiskBenefitNetAmountAtRisk"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MarketRiskBenefitLineItems_188d835e-905d-436a-93b9-b4f42b0b5bd5" xlink:to="loc_us-gaap_MarketRiskBenefitNetAmountAtRisk_c66027f7-a728-4fc7-b8f4-29f03f1f8d51" xlink:type="arc" order="6"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/MarketRiskBenefitsReconciliationofAssetandLiabilityDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#MarketRiskBenefitsReconciliationofAssetandLiabilityDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/MarketRiskBenefitsReconciliationofAssetandLiabilityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketRiskBenefitLineItems_a29f9711-c856-4eab-99d1-738a0617a1bc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MarketRiskBenefitLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketRiskBenefitTable_3b97485b-b925-433c-9e3c-53efd5284ce3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MarketRiskBenefitTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_MarketRiskBenefitLineItems_a29f9711-c856-4eab-99d1-738a0617a1bc" xlink:to="loc_us-gaap_MarketRiskBenefitTable_3b97485b-b925-433c-9e3c-53efd5284ce3" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_ae742259-22d3-4b19-b0ad-cd35a5b4b986" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_MarketRiskBenefitTable_3b97485b-b925-433c-9e3c-53efd5284ce3" xlink:to="loc_srt_ProductOrServiceAxis_ae742259-22d3-4b19-b0ad-cd35a5b4b986" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_ae742259-22d3-4b19-b0ad-cd35a5b4b986_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_ae742259-22d3-4b19-b0ad-cd35a5b4b986" xlink:to="loc_srt_ProductsAndServicesDomain_ae742259-22d3-4b19-b0ad-cd35a5b4b986_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_e01d809b-d65e-47d2-88f5-6bf180570532" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_ae742259-22d3-4b19-b0ad-cd35a5b4b986" xlink:to="loc_srt_ProductsAndServicesDomain_e01d809b-d65e-47d2-88f5-6bf180570532" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FixedAnnuityMember_934dc276-8f57-4635-bacd-8c3c94538098" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FixedAnnuityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_e01d809b-d65e-47d2-88f5-6bf180570532" xlink:to="loc_us-gaap_FixedAnnuityMember_934dc276-8f57-4635-bacd-8c3c94538098" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FixedIndexAnnuityMember_b5908f2e-536e-4591-b7f5-cf9814e3dd15" xlink:href="fnf-20231231.xsd#fnf_FixedIndexAnnuityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_e01d809b-d65e-47d2-88f5-6bf180570532" xlink:to="loc_fnf_FixedIndexAnnuityMember_b5908f2e-536e-4591-b7f5-cf9814e3dd15" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketRiskBenefitAssetAmount_cd84ad1e-f278-432c-bc84-da708acf2d18" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MarketRiskBenefitAssetAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MarketRiskBenefitLineItems_a29f9711-c856-4eab-99d1-738a0617a1bc" xlink:to="loc_us-gaap_MarketRiskBenefitAssetAmount_cd84ad1e-f278-432c-bc84-da708acf2d18" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketRiskBenefitLiabilityAmount_927bb2ab-2f6f-47b7-a2fa-93fdb1305977" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MarketRiskBenefitLiabilityAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MarketRiskBenefitLineItems_a29f9711-c856-4eab-99d1-738a0617a1bc" xlink:to="loc_us-gaap_MarketRiskBenefitLiabilityAmount_927bb2ab-2f6f-47b7-a2fa-93fdb1305977" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_MarketRiskBenefitAfterIncreaseDecreaseFromInstrumentSpecificCreditRisk_ada08a0d-af4c-4528-927a-f7c403bad63e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_MarketRiskBenefitAfterIncreaseDecreaseFromInstrumentSpecificCreditRisk"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_MarketRiskBenefitLineItems_a29f9711-c856-4eab-99d1-738a0617a1bc" xlink:to="loc_us-gaap_MarketRiskBenefitAfterIncreaseDecreaseFromInstrumentSpecificCreditRisk_ada08a0d-af4c-4528-927a-f7c403bad63e" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/ContractholderFundsSummaryofBalancesandChangesinContractholderFundsDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#ContractholderFundsSummaryofBalancesandChangesinContractholderFundsDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/ContractholderFundsSummaryofBalancesandChangesinContractholderFundsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PolicyholderAccountBalanceLineItems_1b77f348-9fc9-4c94-a5ac-fd5709d38f13" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PolicyholderAccountBalanceLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PolicyholderAccountBalanceTable_4db09aad-9ce0-4a27-8571-f06057a0916d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PolicyholderAccountBalanceTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PolicyholderAccountBalanceLineItems_1b77f348-9fc9-4c94-a5ac-fd5709d38f13" xlink:to="loc_us-gaap_PolicyholderAccountBalanceTable_4db09aad-9ce0-4a27-8571-f06057a0916d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_de215293-9f48-4445-8592-da09daf27d6e" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_PolicyholderAccountBalanceTable_4db09aad-9ce0-4a27-8571-f06057a0916d" xlink:to="loc_srt_ProductOrServiceAxis_de215293-9f48-4445-8592-da09daf27d6e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_de215293-9f48-4445-8592-da09daf27d6e_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_de215293-9f48-4445-8592-da09daf27d6e" xlink:to="loc_srt_ProductsAndServicesDomain_de215293-9f48-4445-8592-da09daf27d6e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_aae0629a-f403-4944-8c02-8113ae6a28e9" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_de215293-9f48-4445-8592-da09daf27d6e" xlink:to="loc_srt_ProductsAndServicesDomain_aae0629a-f403-4944-8c02-8113ae6a28e9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FixedIndexAnnuityMember_c64df3bc-7292-4219-bd5f-b687055ab462" xlink:href="fnf-20231231.xsd#fnf_FixedIndexAnnuityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_aae0629a-f403-4944-8c02-8113ae6a28e9" xlink:to="loc_fnf_FixedIndexAnnuityMember_c64df3bc-7292-4219-bd5f-b687055ab462" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FixedAnnuityMember_a64ef8a4-05b7-47e2-a059-4a7a5ba241eb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FixedAnnuityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_aae0629a-f403-4944-8c02-8113ae6a28e9" xlink:to="loc_us-gaap_FixedAnnuityMember_a64ef8a4-05b7-47e2-a059-4a7a5ba241eb" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UniversalLifeMember_3096d8ff-e7e7-4ed4-952c-2860c0fe10c2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UniversalLifeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_aae0629a-f403-4944-8c02-8113ae6a28e9" xlink:to="loc_us-gaap_UniversalLifeMember_3096d8ff-e7e7-4ed4-952c-2860c0fe10c2" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FundingAgreementsFABNMember_dda714d9-f66a-4f8d-9db7-f26edb7d9f96" xlink:href="fnf-20231231.xsd#fnf_FundingAgreementsFABNMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_aae0629a-f403-4944-8c02-8113ae6a28e9" xlink:to="loc_fnf_FundingAgreementsFABNMember_dda714d9-f66a-4f8d-9db7-f26edb7d9f96" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FundingAgreementsFederalHomeLoanBankMember_70d5f5c6-2e3b-4285-9094-af6e116ba8e4" xlink:href="fnf-20231231.xsd#fnf_FundingAgreementsFederalHomeLoanBankMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_aae0629a-f403-4944-8c02-8113ae6a28e9" xlink:to="loc_fnf_FundingAgreementsFederalHomeLoanBankMember_70d5f5c6-2e3b-4285-9094-af6e116ba8e4" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PolicyholderAccountBalanceRollForward_3127f3f1-991f-48f2-ad48-9533e5d46b1e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PolicyholderAccountBalanceRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PolicyholderAccountBalanceLineItems_1b77f348-9fc9-4c94-a5ac-fd5709d38f13" xlink:to="loc_us-gaap_PolicyholderAccountBalanceRollForward_3127f3f1-991f-48f2-ad48-9533e5d46b1e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PolicyholderFunds_781784d2-c152-401d-b1e7-8f651e037d23" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PolicyholderFunds"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PolicyholderAccountBalanceRollForward_3127f3f1-991f-48f2-ad48-9533e5d46b1e" xlink:to="loc_us-gaap_PolicyholderFunds_781784d2-c152-401d-b1e7-8f651e037d23" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PolicyholderAccountBalanceIssuance_63b883bb-83f3-4e5c-b998-22519d13d35b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PolicyholderAccountBalanceIssuance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PolicyholderFunds_781784d2-c152-401d-b1e7-8f651e037d23" xlink:to="loc_us-gaap_PolicyholderAccountBalanceIssuance_63b883bb-83f3-4e5c-b998-22519d13d35b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PolicyholderAccountBalancePremiumReceived_d0e4b162-3fb3-45fa-ae5d-e5cbeaafd706" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PolicyholderAccountBalancePremiumReceived"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PolicyholderFunds_781784d2-c152-401d-b1e7-8f651e037d23" xlink:to="loc_us-gaap_PolicyholderAccountBalancePremiumReceived_d0e4b162-3fb3-45fa-ae5d-e5cbeaafd706" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PolicyholderAccountBalancePolicyCharge_ebeaa6e3-649a-4026-a1fb-c8f02fcccf53" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PolicyholderAccountBalancePolicyCharge"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PolicyholderFunds_781784d2-c152-401d-b1e7-8f651e037d23" xlink:to="loc_us-gaap_PolicyholderAccountBalancePolicyCharge_ebeaa6e3-649a-4026-a1fb-c8f02fcccf53" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PolicyholderAccountBalanceSurrenderAndWithdrawal_9578bdd8-8da2-4e18-a6ee-8317842baf08" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PolicyholderAccountBalanceSurrenderAndWithdrawal"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PolicyholderFunds_781784d2-c152-401d-b1e7-8f651e037d23" xlink:to="loc_us-gaap_PolicyholderAccountBalanceSurrenderAndWithdrawal_9578bdd8-8da2-4e18-a6ee-8317842baf08" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PolicyholderAccountBalanceBenefitPayment_e8d15ef6-9b8c-4fdc-8b48-5782c0f2e26b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PolicyholderAccountBalanceBenefitPayment"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PolicyholderFunds_781784d2-c152-401d-b1e7-8f651e037d23" xlink:to="loc_us-gaap_PolicyholderAccountBalanceBenefitPayment_e8d15ef6-9b8c-4fdc-8b48-5782c0f2e26b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestCreditedToPolicyholdersAccountBalances_d4fbd779-3ccb-41c3-82c5-27b8fef60e35" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InterestCreditedToPolicyholdersAccountBalances"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PolicyholderFunds_781784d2-c152-401d-b1e7-8f651e037d23" xlink:to="loc_us-gaap_InterestCreditedToPolicyholdersAccountBalances_d4fbd779-3ccb-41c3-82c5-27b8fef60e35" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PolicyholderAccountBalanceIncreaseDecreaseFromOtherChange_8db8276c-cb9c-42e7-a0b3-1e48b2662a60" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PolicyholderAccountBalanceIncreaseDecreaseFromOtherChange"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PolicyholderFunds_781784d2-c152-401d-b1e7-8f651e037d23" xlink:to="loc_us-gaap_PolicyholderAccountBalanceIncreaseDecreaseFromOtherChange_8db8276c-cb9c-42e7-a0b3-1e48b2662a60" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PolicyholderFunds_ca669d68-8750-43ca-928a-74cd408e815c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PolicyholderFunds"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmbeddedDerivativeGainLossOnEmbeddedDerivativeNet_5e562ca6-e475-43a0-8a04-da1ab5244a6b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EmbeddedDerivativeGainLossOnEmbeddedDerivativeNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PolicyholderAccountBalanceRollForward_3127f3f1-991f-48f2-ad48-9533e5d46b1e" xlink:to="loc_us-gaap_EmbeddedDerivativeGainLossOnEmbeddedDerivativeNet_5e562ca6-e475-43a0-8a04-da1ab5244a6b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_PolicyHolderAccountBalanceGrossLiability_e80806e9-d191-42ef-9a3c-688a66654d77" xlink:href="fnf-20231231.xsd#fnf_PolicyHolderAccountBalanceGrossLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PolicyholderAccountBalanceRollForward_3127f3f1-991f-48f2-ad48-9533e5d46b1e" xlink:to="loc_fnf_PolicyHolderAccountBalanceGrossLiability_e80806e9-d191-42ef-9a3c-688a66654d77" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReinsuranceRecoverables_c7ee4e91-1b99-4d94-b9a7-a019faff1ad4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ReinsuranceRecoverables"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PolicyholderAccountBalanceRollForward_3127f3f1-991f-48f2-ad48-9533e5d46b1e" xlink:to="loc_us-gaap_ReinsuranceRecoverables_c7ee4e91-1b99-4d94-b9a7-a019faff1ad4" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_PolicyholderAccountBalanceNetOfDepositAsset_01155457-e865-4689-acdb-33ed28f084ba" xlink:href="fnf-20231231.xsd#fnf_PolicyholderAccountBalanceNetOfDepositAsset"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PolicyholderAccountBalanceRollForward_3127f3f1-991f-48f2-ad48-9533e5d46b1e" xlink:to="loc_fnf_PolicyholderAccountBalanceNetOfDepositAsset_01155457-e865-4689-acdb-33ed28f084ba" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PolicyholderAccountBalanceWeightedAverageCreditingRate_5cda155f-e3a2-4e7b-ad7d-37f4285684ba" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PolicyholderAccountBalanceWeightedAverageCreditingRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PolicyholderAccountBalanceRollForward_3127f3f1-991f-48f2-ad48-9533e5d46b1e" xlink:to="loc_us-gaap_PolicyholderAccountBalanceWeightedAverageCreditingRate_5cda155f-e3a2-4e7b-ad7d-37f4285684ba" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PolicyholderAccountBalanceNetAmountAtRisk_edfe10bd-9f45-4103-a88a-f4d6f029db7b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PolicyholderAccountBalanceNetAmountAtRisk"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PolicyholderAccountBalanceRollForward_3127f3f1-991f-48f2-ad48-9533e5d46b1e" xlink:to="loc_us-gaap_PolicyholderAccountBalanceNetAmountAtRisk_edfe10bd-9f45-4103-a88a-f4d6f029db7b" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashSurrenderValueDuePolicyholdersAmount_2855b693-7d3f-400d-b6b3-62530277361a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CashSurrenderValueDuePolicyholdersAmount"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PolicyholderAccountBalanceRollForward_3127f3f1-991f-48f2-ad48-9533e5d46b1e" xlink:to="loc_us-gaap_CashSurrenderValueDuePolicyholdersAmount_2855b693-7d3f-400d-b6b3-62530277361a" xlink:type="arc" order="9"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/ContractholderFundsReconciliationtoCondensedConsolidatedBalanceSheetsDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#ContractholderFundsReconciliationtoCondensedConsolidatedBalanceSheetsDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/ContractholderFundsReconciliationtoCondensedConsolidatedBalanceSheetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PolicyholderAccountBalanceLineItems_62f6d1e1-46b0-43a0-aadb-8d4a32147f9d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PolicyholderAccountBalanceLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PolicyholderAccountBalanceTable_36305b3a-9119-4d7f-9751-cfa482b15e19" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PolicyholderAccountBalanceTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PolicyholderAccountBalanceLineItems_62f6d1e1-46b0-43a0-aadb-8d4a32147f9d" xlink:to="loc_us-gaap_PolicyholderAccountBalanceTable_36305b3a-9119-4d7f-9751-cfa482b15e19" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_effe4f93-dd12-422a-8fe2-7a73e1e5e3d5" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_PolicyholderAccountBalanceTable_36305b3a-9119-4d7f-9751-cfa482b15e19" xlink:to="loc_srt_ProductOrServiceAxis_effe4f93-dd12-422a-8fe2-7a73e1e5e3d5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_effe4f93-dd12-422a-8fe2-7a73e1e5e3d5_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_effe4f93-dd12-422a-8fe2-7a73e1e5e3d5" xlink:to="loc_srt_ProductsAndServicesDomain_effe4f93-dd12-422a-8fe2-7a73e1e5e3d5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_c412eb9f-35d6-4162-8411-3a433400361f" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_effe4f93-dd12-422a-8fe2-7a73e1e5e3d5" xlink:to="loc_srt_ProductsAndServicesDomain_c412eb9f-35d6-4162-8411-3a433400361f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FixedIndexAnnuityMember_1bc62db0-05a0-42b1-a8ba-d2488e1274eb" xlink:href="fnf-20231231.xsd#fnf_FixedIndexAnnuityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_c412eb9f-35d6-4162-8411-3a433400361f" xlink:to="loc_fnf_FixedIndexAnnuityMember_1bc62db0-05a0-42b1-a8ba-d2488e1274eb" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FixedAnnuityMember_3f13ed3e-5bc0-4f04-ac1a-d825aaa84781" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FixedAnnuityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_c412eb9f-35d6-4162-8411-3a433400361f" xlink:to="loc_us-gaap_FixedAnnuityMember_3f13ed3e-5bc0-4f04-ac1a-d825aaa84781" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_ImmediateAnnuityMember_9e4d19d2-2dff-42e6-8874-06e83c31f8ee" xlink:href="fnf-20231231.xsd#fnf_ImmediateAnnuityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_c412eb9f-35d6-4162-8411-3a433400361f" xlink:to="loc_fnf_ImmediateAnnuityMember_9e4d19d2-2dff-42e6-8874-06e83c31f8ee" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UniversalLifeMember_b26ea570-286d-4feb-80fc-5ae9a34398af" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UniversalLifeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_c412eb9f-35d6-4162-8411-3a433400361f" xlink:to="loc_us-gaap_UniversalLifeMember_b26ea570-286d-4feb-80fc-5ae9a34398af" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_TraditionalLifeInsuranceMember_005f00c9-03fb-4c76-a31e-9d2b710b79c6" xlink:href="fnf-20231231.xsd#fnf_TraditionalLifeInsuranceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_c412eb9f-35d6-4162-8411-3a433400361f" xlink:to="loc_fnf_TraditionalLifeInsuranceMember_005f00c9-03fb-4c76-a31e-9d2b710b79c6" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FundingAgreementsFABNMember_bce91878-d6af-47ae-a934-2abd536ae70a" xlink:href="fnf-20231231.xsd#fnf_FundingAgreementsFABNMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_c412eb9f-35d6-4162-8411-3a433400361f" xlink:to="loc_fnf_FundingAgreementsFABNMember_bce91878-d6af-47ae-a934-2abd536ae70a" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FundingAgreementsFederalHomeLoanBankMember_fb301ca4-7338-48f3-bc65-716332d450f2" xlink:href="fnf-20231231.xsd#fnf_FundingAgreementsFederalHomeLoanBankMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_c412eb9f-35d6-4162-8411-3a433400361f" xlink:to="loc_fnf_FundingAgreementsFederalHomeLoanBankMember_fb301ca4-7338-48f3-bc65-716332d450f2" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_PRTMember_701a857d-c045-4d98-a3dc-4893db639355" xlink:href="fnf-20231231.xsd#fnf_PRTMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_c412eb9f-35d6-4162-8411-3a433400361f" xlink:to="loc_fnf_PRTMember_701a857d-c045-4d98-a3dc-4893db639355" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_PolicyHolderAccountBalanceGrossLiability_5e253cff-62b1-4f97-806f-7f23896873b6" xlink:href="fnf-20231231.xsd#fnf_PolicyHolderAccountBalanceGrossLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PolicyholderAccountBalanceLineItems_62f6d1e1-46b0-43a0-aadb-8d4a32147f9d" xlink:to="loc_fnf_PolicyHolderAccountBalanceGrossLiability_5e253cff-62b1-4f97-806f-7f23896873b6" xlink:type="arc" order="0"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/ContractholderFundsAccountValuesbyRangeofGuaranteedMinimumCreditRatingDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#ContractholderFundsAccountValuesbyRangeofGuaranteedMinimumCreditRatingDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/ContractholderFundsAccountValuesbyRangeofGuaranteedMinimumCreditRatingDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PolicyholderAccountBalanceLineItems_0256bee6-0dfc-4db7-ba40-ed9607297cfb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PolicyholderAccountBalanceLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PolicyholderAccountBalanceTable_85d32076-77f1-4f95-8620-aa948b305c20" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PolicyholderAccountBalanceTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_PolicyholderAccountBalanceLineItems_0256bee6-0dfc-4db7-ba40-ed9607297cfb" xlink:to="loc_us-gaap_PolicyholderAccountBalanceTable_85d32076-77f1-4f95-8620-aa948b305c20" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_5c64020a-e8ba-414d-b24c-53f8ad2a6b30" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_PolicyholderAccountBalanceTable_85d32076-77f1-4f95-8620-aa948b305c20" xlink:to="loc_srt_RangeAxis_5c64020a-e8ba-414d-b24c-53f8ad2a6b30" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_5c64020a-e8ba-414d-b24c-53f8ad2a6b30_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_5c64020a-e8ba-414d-b24c-53f8ad2a6b30" xlink:to="loc_srt_RangeMember_5c64020a-e8ba-414d-b24c-53f8ad2a6b30_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_912678f0-b736-4be6-b893-97cecb9acae6" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_5c64020a-e8ba-414d-b24c-53f8ad2a6b30" xlink:to="loc_srt_RangeMember_912678f0-b736-4be6-b893-97cecb9acae6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_d5882732-30c3-4e4d-87a7-80b6b9b2e565" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_912678f0-b736-4be6-b893-97cecb9acae6" xlink:to="loc_srt_MinimumMember_d5882732-30c3-4e4d-87a7-80b6b9b2e565" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_a8730eee-3bfe-4189-8963-71b94df8a346" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_912678f0-b736-4be6-b893-97cecb9acae6" xlink:to="loc_srt_MaximumMember_a8730eee-3bfe-4189-8963-71b94df8a346" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_56637169-09dc-4059-9f9c-0efca5e8a721" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_PolicyholderAccountBalanceTable_85d32076-77f1-4f95-8620-aa948b305c20" xlink:to="loc_srt_ProductOrServiceAxis_56637169-09dc-4059-9f9c-0efca5e8a721" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_56637169-09dc-4059-9f9c-0efca5e8a721_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_56637169-09dc-4059-9f9c-0efca5e8a721" xlink:to="loc_srt_ProductsAndServicesDomain_56637169-09dc-4059-9f9c-0efca5e8a721_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_b23dd0b0-8316-48ce-8cfd-3cf5207686c6" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_56637169-09dc-4059-9f9c-0efca5e8a721" xlink:to="loc_srt_ProductsAndServicesDomain_b23dd0b0-8316-48ce-8cfd-3cf5207686c6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FixedIndexAnnuityMember_d28937df-b01c-4701-866f-86e509b4095d" xlink:href="fnf-20231231.xsd#fnf_FixedIndexAnnuityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_b23dd0b0-8316-48ce-8cfd-3cf5207686c6" xlink:to="loc_fnf_FixedIndexAnnuityMember_d28937df-b01c-4701-866f-86e509b4095d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FixedAnnuityMember_c0ba7af9-5a4e-448d-af60-71b58e3e57ab" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_FixedAnnuityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_b23dd0b0-8316-48ce-8cfd-3cf5207686c6" xlink:to="loc_us-gaap_FixedAnnuityMember_c0ba7af9-5a4e-448d-af60-71b58e3e57ab" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_UniversalLifeMember_acb33556-f5c0-4a95-94af-767045abc9e8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_UniversalLifeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_b23dd0b0-8316-48ce-8cfd-3cf5207686c6" xlink:to="loc_us-gaap_UniversalLifeMember_acb33556-f5c0-4a95-94af-767045abc9e8" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeAxis_8fabf39a-b1b6-4f43-a941-512539eb4e46" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_PolicyholderAccountBalanceTable_85d32076-77f1-4f95-8620-aa948b305c20" xlink:to="loc_us-gaap_PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeAxis_8fabf39a-b1b6-4f43-a941-512539eb4e46" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeDomain_8fabf39a-b1b6-4f43-a941-512539eb4e46_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeAxis_8fabf39a-b1b6-4f43-a941-512539eb4e46" xlink:to="loc_us-gaap_PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeDomain_8fabf39a-b1b6-4f43-a941-512539eb4e46_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeDomain_5f3cc6d0-0506-4138-9a95-14204a6d46fd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeAxis_8fabf39a-b1b6-4f43-a941-512539eb4e46" xlink:to="loc_us-gaap_PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeDomain_5f3cc6d0-0506-4138-9a95-14204a6d46fd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom000To150Member_4c6c94ca-40d3-4148-b989-8eea92daec55" xlink:href="fnf-20231231.xsd#fnf_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom000To150Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeDomain_5f3cc6d0-0506-4138-9a95-14204a6d46fd" xlink:to="loc_fnf_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom000To150Member_4c6c94ca-40d3-4148-b989-8eea92daec55" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom151To250Member_74b81627-5c30-4618-a513-0ef6515d8a91" xlink:href="fnf-20231231.xsd#fnf_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom151To250Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeDomain_5f3cc6d0-0506-4138-9a95-14204a6d46fd" xlink:to="loc_fnf_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom151To250Member_74b81627-5c30-4618-a513-0ef6515d8a91" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeGreaterThan250Member_e8af9a77-d43b-4c29-9f26-128a344dec12" xlink:href="fnf-20231231.xsd#fnf_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeGreaterThan250Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PolicyholderAccountBalanceGuaranteedMinimumCreditingRateRangeDomain_5f3cc6d0-0506-4138-9a95-14204a6d46fd" xlink:to="loc_fnf_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeGreaterThan250Member_e8af9a77-d43b-4c29-9f26-128a344dec12" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateAxis_dde8e27a-b13e-4226-9e23-ec2104a70c42" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_PolicyholderAccountBalanceTable_85d32076-77f1-4f95-8620-aa948b305c20" xlink:to="loc_us-gaap_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateAxis_dde8e27a-b13e-4226-9e23-ec2104a70c42" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateDomain_dde8e27a-b13e-4226-9e23-ec2104a70c42_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateAxis_dde8e27a-b13e-4226-9e23-ec2104a70c42" xlink:to="loc_us-gaap_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateDomain_dde8e27a-b13e-4226-9e23-ec2104a70c42_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateDomain_6fd27cbe-6a6a-4cae-b2eb-af6697544493" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateAxis_dde8e27a-b13e-4226-9e23-ec2104a70c42" xlink:to="loc_us-gaap_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateDomain_6fd27cbe-6a6a-4cae-b2eb-af6697544493" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMember_f3281608-3eeb-4bb7-9e51-fd81136d18dc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateDomain_6fd27cbe-6a6a-4cae-b2eb-af6697544493" xlink:to="loc_us-gaap_PolicyholderAccountBalanceAtGuaranteedMinimumCreditingRateMember_f3281608-3eeb-4bb7-9e51-fd81136d18dc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Member_79003c15-63ae-4f74-a0dd-691b5c56ce6c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateDomain_6fd27cbe-6a6a-4cae-b2eb-af6697544493" xlink:to="loc_us-gaap_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0001To0050Member_79003c15-63ae-4f74-a0dd-691b5c56ce6c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0150Member_a0f84551-5a46-4b48-86b8-c970566e30cc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0150Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateDomain_6fd27cbe-6a6a-4cae-b2eb-af6697544493" xlink:to="loc_us-gaap_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateRangeFrom0051To0150Member_a0f84551-5a46-4b48-86b8-c970566e30cc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateGreaterThan0150Member_03b3ffbe-4efe-49e7-a720-d941491cd0e4" xlink:href="fnf-20231231.xsd#fnf_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateGreaterThan0150Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateDomain_6fd27cbe-6a6a-4cae-b2eb-af6697544493" xlink:to="loc_fnf_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRateGreaterThan0150Member_03b3ffbe-4efe-49e7-a720-d941491cd0e4" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRate_f2f43508-b9c8-40cd-b793-2c8eb0981dd9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PolicyholderAccountBalanceLineItems_0256bee6-0dfc-4db7-ba40-ed9607297cfb" xlink:to="loc_us-gaap_PolicyholderAccountBalanceAboveGuaranteedMinimumCreditingRate_f2f43508-b9c8-40cd-b793-2c8eb0981dd9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PolicyholderFunds_c7d67831-5df6-422e-bff4-413ffbbc532a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PolicyholderFunds"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_PolicyholderAccountBalanceLineItems_0256bee6-0dfc-4db7-ba40-ed9607297cfb" xlink:to="loc_us-gaap_PolicyholderFunds_c7d67831-5df6-422e-bff4-413ffbbc532a" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/FuturePolicyBenefitsSummaryBalancesandChangesinthePresentValueofExpectedNetPremiumsandPresentValueDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#FuturePolicyBenefitsSummaryBalancesandChangesinthePresentValueofExpectedNetPremiumsandPresentValueDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/FuturePolicyBenefitsSummaryBalancesandChangesinthePresentValueofExpectedNetPremiumsandPresentValueDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityLineItems_4e52e036-73e8-44ef-a81c-472ca56b5e76" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefitActivityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityTable_90f53cf6-fe90-435f-848a-b0356d1d498d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefitActivityTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityLineItems_4e52e036-73e8-44ef-a81c-472ca56b5e76" xlink:to="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityTable_90f53cf6-fe90-435f-848a-b0356d1d498d" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_4f74f8ce-a47e-48a4-a660-04dfdf8caf17" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityTable_90f53cf6-fe90-435f-848a-b0356d1d498d" xlink:to="loc_srt_ProductOrServiceAxis_4f74f8ce-a47e-48a4-a660-04dfdf8caf17" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_4f74f8ce-a47e-48a4-a660-04dfdf8caf17_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_4f74f8ce-a47e-48a4-a660-04dfdf8caf17" xlink:to="loc_srt_ProductsAndServicesDomain_4f74f8ce-a47e-48a4-a660-04dfdf8caf17_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_9c4902ac-2be5-4082-be12-6b90d810aa72" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_4f74f8ce-a47e-48a4-a660-04dfdf8caf17" xlink:to="loc_srt_ProductsAndServicesDomain_9c4902ac-2be5-4082-be12-6b90d810aa72" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_TraditionalLifeInsuranceMember_f2e03b06-f755-4db8-b90c-bebf5c51dbe9" xlink:href="fnf-20231231.xsd#fnf_TraditionalLifeInsuranceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_9c4902ac-2be5-4082-be12-6b90d810aa72" xlink:to="loc_fnf_TraditionalLifeInsuranceMember_f2e03b06-f755-4db8-b90c-bebf5c51dbe9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_PRTMember_b9c1d7d4-f59c-4fb7-b651-31926a009b4c" xlink:href="fnf-20231231.xsd#fnf_PRTMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_9c4902ac-2be5-4082-be12-6b90d810aa72" xlink:to="loc_fnf_PRTMember_b9c1d7d4-f59c-4fb7-b651-31926a009b4c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_ImmediateAnnuityMember_1e0b08f1-ef20-4f7b-9c8d-61854653c918" xlink:href="fnf-20231231.xsd#fnf_ImmediateAnnuityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_9c4902ac-2be5-4082-be12-6b90d810aa72" xlink:to="loc_fnf_ImmediateAnnuityMember_1e0b08f1-ef20-4f7b-9c8d-61854653c918" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedNetPremiumRollForward_202f0d1c-ec73-4c64-b6eb-724cd0587010" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefitExpectedNetPremiumRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityLineItems_4e52e036-73e8-44ef-a81c-472ca56b5e76" xlink:to="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedNetPremiumRollForward_202f0d1c-ec73-4c64-b6eb-724cd0587010" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedNetPremiumBeforeReinsuranceAfterDiscountRateChange_08e59bd0-eb03-452e-8648-2b504c9c492e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefitExpectedNetPremiumBeforeReinsuranceAfterDiscountRateChange"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedNetPremiumRollForward_202f0d1c-ec73-4c64-b6eb-724cd0587010" xlink:to="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedNetPremiumBeforeReinsuranceAfterDiscountRateChange_08e59bd0-eb03-452e-8648-2b504c9c492e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedNetPremiumOriginalDiscountRateBeforeCashFlowAndReinsurance_990728c8-68fe-4c11-b54d-35d286ced23f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefitExpectedNetPremiumOriginalDiscountRateBeforeCashFlowAndReinsurance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedNetPremiumRollForward_202f0d1c-ec73-4c64-b6eb-724cd0587010" xlink:to="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedNetPremiumOriginalDiscountRateBeforeCashFlowAndReinsurance_990728c8-68fe-4c11-b54d-35d286ced23f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedNetPremiumCumulativeIncreaseDecreaseOfActualVarianceFromExpectedExperience_117e287a-9fca-42ec-876b-a7b261c027fa" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefitExpectedNetPremiumCumulativeIncreaseDecreaseOfActualVarianceFromExpectedExperience"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedNetPremiumOriginalDiscountRateBeforeCashFlowAndReinsurance_990728c8-68fe-4c11-b54d-35d286ced23f" xlink:to="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedNetPremiumCumulativeIncreaseDecreaseOfActualVarianceFromExpectedExperience_117e287a-9fca-42ec-876b-a7b261c027fa" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedNetPremiumOriginalDiscountRateBeforeReinsuranceAfterCashFlowChange_9511dccb-25e7-4333-af62-60a4225cd929" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefitExpectedNetPremiumOriginalDiscountRateBeforeReinsuranceAfterCashFlowChange"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedNetPremiumRollForward_202f0d1c-ec73-4c64-b6eb-724cd0587010" xlink:to="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedNetPremiumOriginalDiscountRateBeforeReinsuranceAfterCashFlowChange_9511dccb-25e7-4333-af62-60a4225cd929" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedNetPremiumInterestIncome_9917031d-3594-4f3b-b623-713c9334730f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefitExpectedNetPremiumInterestIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedNetPremiumOriginalDiscountRateBeforeReinsuranceAfterCashFlowChange_9511dccb-25e7-4333-af62-60a4225cd929" xlink:to="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedNetPremiumInterestIncome_9917031d-3594-4f3b-b623-713c9334730f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedNetPremiumNetPremiumCollected_6d335cba-67fb-4d2b-afa5-eb97712d0845" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefitExpectedNetPremiumNetPremiumCollected"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedNetPremiumOriginalDiscountRateBeforeReinsuranceAfterCashFlowChange_9511dccb-25e7-4333-af62-60a4225cd929" xlink:to="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedNetPremiumNetPremiumCollected_6d335cba-67fb-4d2b-afa5-eb97712d0845" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedNetPremiumOriginalDiscountRateBeforeCashFlowAndReinsurance_691f8b7f-6eb7-4d97-9f45-817089d0faa6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefitExpectedNetPremiumOriginalDiscountRateBeforeCashFlowAndReinsurance"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AociLiabilityForFuturePolicyBenefitExpectedNetPremiumBeforeTax_7f8bcb20-5e36-4c4b-94ca-b7585f59f962" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AociLiabilityForFuturePolicyBenefitExpectedNetPremiumBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedNetPremiumRollForward_202f0d1c-ec73-4c64-b6eb-724cd0587010" xlink:to="loc_us-gaap_AociLiabilityForFuturePolicyBenefitExpectedNetPremiumBeforeTax_7f8bcb20-5e36-4c4b-94ca-b7585f59f962" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedNetPremiumBeforeReinsuranceAfterDiscountRateChange_7726ed1b-f24a-40ee-8d32-38444d6c89bb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefitExpectedNetPremiumBeforeReinsuranceAfterDiscountRateChange"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitRollForward_8f39fdc9-c17a-4b02-a705-c8511d9a4998" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitRollForward"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityLineItems_4e52e036-73e8-44ef-a81c-472ca56b5e76" xlink:to="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitRollForward_8f39fdc9-c17a-4b02-a705-c8511d9a4998" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitBeforeReinsuranceAfterDiscountRateChange_f12db905-784c-44a1-a5f1-a46dccec4233" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitBeforeReinsuranceAfterDiscountRateChange"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitRollForward_8f39fdc9-c17a-4b02-a705-c8511d9a4998" xlink:to="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitBeforeReinsuranceAfterDiscountRateChange_f12db905-784c-44a1-a5f1-a46dccec4233" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitOriginalDiscountRateBeforeCashFlowAndReinsurance_9ce16c8e-86e9-4d8c-acb4-87e35a9082f1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitOriginalDiscountRateBeforeCashFlowAndReinsurance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitRollForward_8f39fdc9-c17a-4b02-a705-c8511d9a4998" xlink:to="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitOriginalDiscountRateBeforeCashFlowAndReinsurance_9ce16c8e-86e9-4d8c-acb4-87e35a9082f1" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitCumulativeIncreaseDecreaseFromCashFlowChange_e1469b29-807a-4438-884d-9635f7fea9dd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitCumulativeIncreaseDecreaseFromCashFlowChange"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitOriginalDiscountRateBeforeCashFlowAndReinsurance_9ce16c8e-86e9-4d8c-acb4-87e35a9082f1" xlink:to="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitCumulativeIncreaseDecreaseFromCashFlowChange_e1469b29-807a-4438-884d-9635f7fea9dd" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitCumulativeIncreaseDecreaseOfActualVarianceFromExpectedExperience_b7744817-3202-46a1-a524-1592fee9528d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitCumulativeIncreaseDecreaseOfActualVarianceFromExpectedExperience"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitOriginalDiscountRateBeforeCashFlowAndReinsurance_9ce16c8e-86e9-4d8c-acb4-87e35a9082f1" xlink:to="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitCumulativeIncreaseDecreaseOfActualVarianceFromExpectedExperience_b7744817-3202-46a1-a524-1592fee9528d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedFutureBenefitOriginalDiscountRateBeforeReinsuranceAfterCashFlowChange_d3d0e2fe-97ff-422e-aa11-c39a8e43270b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefitExpectedFutureBenefitOriginalDiscountRateBeforeReinsuranceAfterCashFlowChange"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitOriginalDiscountRateBeforeCashFlowAndReinsurance_9ce16c8e-86e9-4d8c-acb4-87e35a9082f1" xlink:to="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedFutureBenefitOriginalDiscountRateBeforeReinsuranceAfterCashFlowChange_d3d0e2fe-97ff-422e-aa11-c39a8e43270b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitIssuance_d854b88f-ac14-4400-80ab-a96c801356b3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitIssuance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedFutureBenefitOriginalDiscountRateBeforeReinsuranceAfterCashFlowChange_d3d0e2fe-97ff-422e-aa11-c39a8e43270b" xlink:to="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitIssuance_d854b88f-ac14-4400-80ab-a96c801356b3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitInterestExpense_cae3a8d8-298f-4fac-8676-a7ac4410134b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitInterestExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedFutureBenefitOriginalDiscountRateBeforeReinsuranceAfterCashFlowChange_d3d0e2fe-97ff-422e-aa11-c39a8e43270b" xlink:to="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitInterestExpense_cae3a8d8-298f-4fac-8676-a7ac4410134b" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitsPaymentForBenefits_c7a747f7-af03-43f0-ac69-48271caffb4c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefitsPaymentForBenefits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedFutureBenefitOriginalDiscountRateBeforeReinsuranceAfterCashFlowChange_d3d0e2fe-97ff-422e-aa11-c39a8e43270b" xlink:to="loc_us-gaap_LiabilityForFuturePolicyBenefitsPaymentForBenefits_c7a747f7-af03-43f0-ac69-48271caffb4c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitOriginalDiscountRateBeforeCashFlowAndReinsurance_36e774c8-8d8e-4ac9-af67-9d008b3af499" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitOriginalDiscountRateBeforeCashFlowAndReinsurance"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AociLiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitBeforeTax_492cdf3e-6b63-4027-ab9c-f627644ce6a3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AociLiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitBeforeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitRollForward_8f39fdc9-c17a-4b02-a705-c8511d9a4998" xlink:to="loc_us-gaap_AociLiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitBeforeTax_492cdf3e-6b63-4027-ab9c-f627644ce6a3" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitBeforeReinsuranceAfterDiscountRateChange_a806d0bc-f759-4d6d-9754-f1fafa882ce3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitBeforeReinsuranceAfterDiscountRateChange"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefits_a2941611-8e0e-4eff-a80a-f05d3a756416" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitRollForward_8f39fdc9-c17a-4b02-a705-c8511d9a4998" xlink:to="loc_us-gaap_LiabilityForFuturePolicyBenefits_a2941611-8e0e-4eff-a80a-f05d3a756416" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitReinsuranceRecoverableAfterAllowance_1209a46c-d295-4bcc-83a0-f023e4513e18" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefitReinsuranceRecoverableAfterAllowance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitRollForward_8f39fdc9-c17a-4b02-a705-c8511d9a4998" xlink:to="loc_us-gaap_LiabilityForFuturePolicyBenefitReinsuranceRecoverableAfterAllowance_1209a46c-d295-4bcc-83a0-f023e4513e18" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitAfterReinsurance_19cd6456-07d3-4da1-8a24-a5f3af1da1b8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefitAfterReinsurance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitRollForward_8f39fdc9-c17a-4b02-a705-c8511d9a4998" xlink:to="loc_us-gaap_LiabilityForFuturePolicyBenefitAfterReinsurance_19cd6456-07d3-4da1-8a24-a5f3af1da1b8" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitWeightedAverageDuration_0360b2f8-fd2f-4116-af38-986b3eed42e5" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefitWeightedAverageDuration"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitRollForward_8f39fdc9-c17a-4b02-a705-c8511d9a4998" xlink:to="loc_us-gaap_LiabilityForFuturePolicyBenefitWeightedAverageDuration_0360b2f8-fd2f-4116-af38-986b3eed42e5" xlink:type="arc" order="9"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/FuturePolicyBenefitsSummaryofBalancesandChangesintheDeferredProfitLiabilityDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#FuturePolicyBenefitsSummaryofBalancesandChangesintheDeferredProfitLiabilityDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/FuturePolicyBenefitsSummaryofBalancesandChangesintheDeferredProfitLiabilityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityLineItems_86d05a12-306b-42ff-884b-44739b0fbcbe" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefitActivityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityTable_c56a95ca-2ab7-4bc9-99f4-fc2ce8e1f98c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefitActivityTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityLineItems_86d05a12-306b-42ff-884b-44739b0fbcbe" xlink:to="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityTable_c56a95ca-2ab7-4bc9-99f4-fc2ce8e1f98c" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_98c0f544-88b2-4e3b-8a97-b0b938cea090" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityTable_c56a95ca-2ab7-4bc9-99f4-fc2ce8e1f98c" xlink:to="loc_srt_ProductOrServiceAxis_98c0f544-88b2-4e3b-8a97-b0b938cea090" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_98c0f544-88b2-4e3b-8a97-b0b938cea090_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_98c0f544-88b2-4e3b-8a97-b0b938cea090" xlink:to="loc_srt_ProductsAndServicesDomain_98c0f544-88b2-4e3b-8a97-b0b938cea090_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_739de356-136f-4072-b311-ee8f7e1602ec" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_98c0f544-88b2-4e3b-8a97-b0b938cea090" xlink:to="loc_srt_ProductsAndServicesDomain_739de356-136f-4072-b311-ee8f7e1602ec" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_ImmediateAnnuityMember_e1dd3f22-0e98-44ed-a25e-5e23b9d3ac1e" xlink:href="fnf-20231231.xsd#fnf_ImmediateAnnuityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_739de356-136f-4072-b311-ee8f7e1602ec" xlink:to="loc_fnf_ImmediateAnnuityMember_e1dd3f22-0e98-44ed-a25e-5e23b9d3ac1e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_PRTMember_cf7bcddc-8b83-4db9-97ec-f5c1fc357749" xlink:href="fnf-20231231.xsd#fnf_PRTMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_739de356-136f-4072-b311-ee8f7e1602ec" xlink:to="loc_fnf_PRTMember_cf7bcddc-8b83-4db9-97ec-f5c1fc357749" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_DeferredProfitLiability_2c737487-f261-4b40-871c-6976780c1e08" xlink:href="fnf-20231231.xsd#fnf_DeferredProfitLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityLineItems_86d05a12-306b-42ff-884b-44739b0fbcbe" xlink:to="loc_fnf_DeferredProfitLiability_2c737487-f261-4b40-871c-6976780c1e08" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_DeferredProfitLiabilityEffectOfModelingChanges_f66f8b1d-49c3-4a54-8a3d-77d77ce4b5a4" xlink:href="fnf-20231231.xsd#fnf_DeferredProfitLiabilityEffectOfModelingChanges"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_DeferredProfitLiability_2c737487-f261-4b40-871c-6976780c1e08" xlink:to="loc_fnf_DeferredProfitLiabilityEffectOfModelingChanges_f66f8b1d-49c3-4a54-8a3d-77d77ce4b5a4" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_DeferredProfitLiabilityEffectOfChangesInCashFlowAssumptions_39ae10d1-c213-4103-9807-64ca0d796823" xlink:href="fnf-20231231.xsd#fnf_DeferredProfitLiabilityEffectOfChangesInCashFlowAssumptions"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_DeferredProfitLiability_2c737487-f261-4b40-871c-6976780c1e08" xlink:to="loc_fnf_DeferredProfitLiabilityEffectOfChangesInCashFlowAssumptions_39ae10d1-c213-4103-9807-64ca0d796823" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_DeferredProfitLiabilityCumulativeIncreaseDecreaseOfActualVarianceFromExpectedExperience_1bf76701-dfc5-4615-a229-b59f77b5c47f" xlink:href="fnf-20231231.xsd#fnf_DeferredProfitLiabilityCumulativeIncreaseDecreaseOfActualVarianceFromExpectedExperience"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_DeferredProfitLiability_2c737487-f261-4b40-871c-6976780c1e08" xlink:to="loc_fnf_DeferredProfitLiabilityCumulativeIncreaseDecreaseOfActualVarianceFromExpectedExperience_1bf76701-dfc5-4615-a229-b59f77b5c47f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_DeferredProfitLiabilityBeforeReinsuranceAfterCashFlowChange_96d70b7f-c9ca-4d83-a037-79e4234c416a" xlink:href="fnf-20231231.xsd#fnf_DeferredProfitLiabilityBeforeReinsuranceAfterCashFlowChange"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityLineItems_86d05a12-306b-42ff-884b-44739b0fbcbe" xlink:to="loc_fnf_DeferredProfitLiabilityBeforeReinsuranceAfterCashFlowChange_96d70b7f-c9ca-4d83-a037-79e4234c416a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_DeferredProfitLiabilityIssuance_ff37433b-4cd1-481f-a0b3-297b8d214cd7" xlink:href="fnf-20231231.xsd#fnf_DeferredProfitLiabilityIssuance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_DeferredProfitLiabilityBeforeReinsuranceAfterCashFlowChange_96d70b7f-c9ca-4d83-a037-79e4234c416a" xlink:to="loc_fnf_DeferredProfitLiabilityIssuance_ff37433b-4cd1-481f-a0b3-297b8d214cd7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_DeferredProfitLiabilityInterestExpense_f83c8e92-15da-42b2-b23f-184adf27b029" xlink:href="fnf-20231231.xsd#fnf_DeferredProfitLiabilityInterestExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_DeferredProfitLiabilityBeforeReinsuranceAfterCashFlowChange_96d70b7f-c9ca-4d83-a037-79e4234c416a" xlink:to="loc_fnf_DeferredProfitLiabilityInterestExpense_f83c8e92-15da-42b2-b23f-184adf27b029" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_DeferredProfitLiabilityAmortization_11a868a0-a7cf-4cc2-bea1-20ae97adda5a" xlink:href="fnf-20231231.xsd#fnf_DeferredProfitLiabilityAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_DeferredProfitLiabilityBeforeReinsuranceAfterCashFlowChange_96d70b7f-c9ca-4d83-a037-79e4234c416a" xlink:to="loc_fnf_DeferredProfitLiabilityAmortization_11a868a0-a7cf-4cc2-bea1-20ae97adda5a" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_DeferredProfitLiability_134ba3b5-48ca-4bea-b0b8-24fa653276be" xlink:href="fnf-20231231.xsd#fnf_DeferredProfitLiability"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/FuturePolicyBenefitsReconciliationofNetFPBtotheCondensedConsolidatedBalanceSheetsDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#FuturePolicyBenefitsReconciliationofNetFPBtotheCondensedConsolidatedBalanceSheetsDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/FuturePolicyBenefitsReconciliationofNetFPBtotheCondensedConsolidatedBalanceSheetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityLineItems_b4c461d5-6a13-4da2-8e46-5a8d33724603" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefitActivityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityTable_fa001bda-7243-44a3-bbd9-8150a592e0ca" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefitActivityTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityLineItems_b4c461d5-6a13-4da2-8e46-5a8d33724603" xlink:to="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityTable_fa001bda-7243-44a3-bbd9-8150a592e0ca" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_ec1675b8-bcae-4dee-a486-cffa4fd94e16" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityTable_fa001bda-7243-44a3-bbd9-8150a592e0ca" xlink:to="loc_srt_ProductOrServiceAxis_ec1675b8-bcae-4dee-a486-cffa4fd94e16" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_ec1675b8-bcae-4dee-a486-cffa4fd94e16_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_ec1675b8-bcae-4dee-a486-cffa4fd94e16" xlink:to="loc_srt_ProductsAndServicesDomain_ec1675b8-bcae-4dee-a486-cffa4fd94e16_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_94d92460-b78d-4a9f-84d0-565e458cf9a2" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_ec1675b8-bcae-4dee-a486-cffa4fd94e16" xlink:to="loc_srt_ProductsAndServicesDomain_94d92460-b78d-4a9f-84d0-565e458cf9a2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_TraditionalLifeInsuranceMember_a7baef5a-92ec-4f54-b56f-c6ead3f659a6" xlink:href="fnf-20231231.xsd#fnf_TraditionalLifeInsuranceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_94d92460-b78d-4a9f-84d0-565e458cf9a2" xlink:to="loc_fnf_TraditionalLifeInsuranceMember_a7baef5a-92ec-4f54-b56f-c6ead3f659a6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_ImmediateAnnuityMember_b6bec066-21ff-4439-9903-fc2c042f15b6" xlink:href="fnf-20231231.xsd#fnf_ImmediateAnnuityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_94d92460-b78d-4a9f-84d0-565e458cf9a2" xlink:to="loc_fnf_ImmediateAnnuityMember_b6bec066-21ff-4439-9903-fc2c042f15b6" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_PRTMember_c0bddc55-ec49-42f7-b1a8-f8facbd73fe4" xlink:href="fnf-20231231.xsd#fnf_PRTMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_94d92460-b78d-4a9f-84d0-565e458cf9a2" xlink:to="loc_fnf_PRTMember_c0bddc55-ec49-42f7-b1a8-f8facbd73fe4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_ImmediateAnnuityDeferredProfitLiabilityMember_8b146737-04fa-440d-9250-77162e73dfb3" xlink:href="fnf-20231231.xsd#fnf_ImmediateAnnuityDeferredProfitLiabilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_94d92460-b78d-4a9f-84d0-565e458cf9a2" xlink:to="loc_fnf_ImmediateAnnuityDeferredProfitLiabilityMember_8b146737-04fa-440d-9250-77162e73dfb3" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_PRTDeferredProfitLiabilityMember_ee1a8aee-60e5-4faa-b788-04b6a8d07497" xlink:href="fnf-20231231.xsd#fnf_PRTDeferredProfitLiabilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_94d92460-b78d-4a9f-84d0-565e458cf9a2" xlink:to="loc_fnf_PRTDeferredProfitLiabilityMember_ee1a8aee-60e5-4faa-b788-04b6a8d07497" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefits_7489a441-6274-4087-bde5-553e02e586c2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefits"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityLineItems_b4c461d5-6a13-4da2-8e46-5a8d33724603" xlink:to="loc_us-gaap_LiabilityForFuturePolicyBenefits_7489a441-6274-4087-bde5-553e02e586c2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_DeferredProfitLiability_71076ccb-c171-4cf7-9df1-117653985fc0" xlink:href="fnf-20231231.xsd#fnf_DeferredProfitLiability"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityLineItems_b4c461d5-6a13-4da2-8e46-5a8d33724603" xlink:to="loc_fnf_DeferredProfitLiability_71076ccb-c171-4cf7-9df1-117653985fc0" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/FuturePolicyBenefitsLiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitUndiscountedDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#FuturePolicyBenefitsLiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitUndiscountedDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/FuturePolicyBenefitsLiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitUndiscountedDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityLineItems_73e0e162-9006-4348-8ddb-2f68d50ca2ce" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefitActivityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityTable_0c1a40be-ab50-492e-8c71-7eca1e150bcb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefitActivityTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityLineItems_73e0e162-9006-4348-8ddb-2f68d50ca2ce" xlink:to="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityTable_0c1a40be-ab50-492e-8c71-7eca1e150bcb" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_178d0661-c7b5-4835-9867-ac7104aee31f" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityTable_0c1a40be-ab50-492e-8c71-7eca1e150bcb" xlink:to="loc_srt_ProductOrServiceAxis_178d0661-c7b5-4835-9867-ac7104aee31f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_178d0661-c7b5-4835-9867-ac7104aee31f_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_178d0661-c7b5-4835-9867-ac7104aee31f" xlink:to="loc_srt_ProductsAndServicesDomain_178d0661-c7b5-4835-9867-ac7104aee31f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_be966226-f1bb-421e-9c63-0dd935f4a1ff" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_178d0661-c7b5-4835-9867-ac7104aee31f" xlink:to="loc_srt_ProductsAndServicesDomain_be966226-f1bb-421e-9c63-0dd935f4a1ff" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_TraditionalLifeInsuranceMember_d7c5f8ae-4d0d-4e33-804b-c975eac03981" xlink:href="fnf-20231231.xsd#fnf_TraditionalLifeInsuranceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_be966226-f1bb-421e-9c63-0dd935f4a1ff" xlink:to="loc_fnf_TraditionalLifeInsuranceMember_d7c5f8ae-4d0d-4e33-804b-c975eac03981" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_ImmediateAnnuityMember_8210edac-085d-4a96-87bb-50c7418dc1d5" xlink:href="fnf-20231231.xsd#fnf_ImmediateAnnuityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_be966226-f1bb-421e-9c63-0dd935f4a1ff" xlink:to="loc_fnf_ImmediateAnnuityMember_8210edac-085d-4a96-87bb-50c7418dc1d5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_PRTMember_c44c9e81-2dd1-4d51-82ea-441c689f4144" xlink:href="fnf-20231231.xsd#fnf_PRTMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_be966226-f1bb-421e-9c63-0dd935f4a1ff" xlink:to="loc_fnf_PRTMember_c44c9e81-2dd1-4d51-82ea-441c689f4144" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitUndiscountedAbstract_bda5181f-4aff-4a61-b5c5-7d92ec112cfc" xlink:href="fnf-20231231.xsd#fnf_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitUndiscountedAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityLineItems_73e0e162-9006-4348-8ddb-2f68d50ca2ce" xlink:to="loc_fnf_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitUndiscountedAbstract_bda5181f-4aff-4a61-b5c5-7d92ec112cfc" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitUndiscountedBeforeReinsurance_6e619413-d124-49b5-b765-5211fb2f226b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitUndiscountedBeforeReinsurance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitUndiscountedAbstract_bda5181f-4aff-4a61-b5c5-7d92ec112cfc" xlink:to="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitUndiscountedBeforeReinsurance_6e619413-d124-49b5-b765-5211fb2f226b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedFutureGrossPremiumUndiscountedBeforeReinsurance_87ce050f-0f42-4d6e-b187-87b16c80b57f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefitExpectedFutureGrossPremiumUndiscountedBeforeReinsurance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitUndiscountedAbstract_bda5181f-4aff-4a61-b5c5-7d92ec112cfc" xlink:to="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedFutureGrossPremiumUndiscountedBeforeReinsurance_87ce050f-0f42-4d6e-b187-87b16c80b57f" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitDiscountedAbstract_b54f69e8-ce37-42fe-ac41-fc8e949ca2d2" xlink:href="fnf-20231231.xsd#fnf_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitDiscountedAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityLineItems_73e0e162-9006-4348-8ddb-2f68d50ca2ce" xlink:to="loc_fnf_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitDiscountedAbstract_b54f69e8-ce37-42fe-ac41-fc8e949ca2d2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitDiscountedBeforeReinsurance_a57e33dd-b8aa-45af-9597-a0e282010a4b" xlink:href="fnf-20231231.xsd#fnf_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitDiscountedBeforeReinsurance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitDiscountedAbstract_b54f69e8-ce37-42fe-ac41-fc8e949ca2d2" xlink:to="loc_fnf_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitDiscountedBeforeReinsurance_a57e33dd-b8aa-45af-9597-a0e282010a4b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedFutureGrossPremiumDiscountedBeforeReinsurance_508e1186-685e-4d36-9cdb-4138c968309a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefitExpectedFutureGrossPremiumDiscountedBeforeReinsurance"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_LiabilityForFuturePolicyBenefitExpectedFuturePolicyBenefitDiscountedAbstract_b54f69e8-ce37-42fe-ac41-fc8e949ca2d2" xlink:to="loc_us-gaap_LiabilityForFuturePolicyBenefitExpectedFutureGrossPremiumDiscountedBeforeReinsurance_508e1186-685e-4d36-9cdb-4138c968309a" xlink:type="arc" order="2"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/FuturePolicyBenefitsGrossPremiumIncomeandInterestExpenseDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#FuturePolicyBenefitsGrossPremiumIncomeandInterestExpenseDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/FuturePolicyBenefitsGrossPremiumIncomeandInterestExpenseDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityLineItems_4ff85d59-fa24-4084-a319-b767fd891720" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefitActivityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityTable_e6070480-59d6-4b15-a9f4-446665c42a09" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefitActivityTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityLineItems_4ff85d59-fa24-4084-a319-b767fd891720" xlink:to="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityTable_e6070480-59d6-4b15-a9f4-446665c42a09" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_94beff05-68b7-4e5e-b5a4-bb60d1487295" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityTable_e6070480-59d6-4b15-a9f4-446665c42a09" xlink:to="loc_srt_ProductOrServiceAxis_94beff05-68b7-4e5e-b5a4-bb60d1487295" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_94beff05-68b7-4e5e-b5a4-bb60d1487295_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_94beff05-68b7-4e5e-b5a4-bb60d1487295" xlink:to="loc_srt_ProductsAndServicesDomain_94beff05-68b7-4e5e-b5a4-bb60d1487295_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_db9c91da-36c4-465f-a431-201592aabe2a" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_94beff05-68b7-4e5e-b5a4-bb60d1487295" xlink:to="loc_srt_ProductsAndServicesDomain_db9c91da-36c4-465f-a431-201592aabe2a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_TraditionalLifeInsuranceMember_19f730c8-f2df-4f0e-9d3e-b5b69de58e20" xlink:href="fnf-20231231.xsd#fnf_TraditionalLifeInsuranceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_db9c91da-36c4-465f-a431-201592aabe2a" xlink:to="loc_fnf_TraditionalLifeInsuranceMember_19f730c8-f2df-4f0e-9d3e-b5b69de58e20" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_ImmediateAnnuityMember_9269a45d-9a6c-4a82-bd6c-0a5ac45bbf5a" xlink:href="fnf-20231231.xsd#fnf_ImmediateAnnuityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_db9c91da-36c4-465f-a431-201592aabe2a" xlink:to="loc_fnf_ImmediateAnnuityMember_9269a45d-9a6c-4a82-bd6c-0a5ac45bbf5a" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_PRTMember_07b530fb-f1ad-49da-a883-3e254b6d7eed" xlink:href="fnf-20231231.xsd#fnf_PRTMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_db9c91da-36c4-465f-a431-201592aabe2a" xlink:to="loc_fnf_PRTMember_07b530fb-f1ad-49da-a883-3e254b6d7eed" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitGrossPremiumIncome_2290390e-9d87-4fdb-8ea6-def99c45ec9e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefitGrossPremiumIncome"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityLineItems_4ff85d59-fa24-4084-a319-b767fd891720" xlink:to="loc_us-gaap_LiabilityForFuturePolicyBenefitGrossPremiumIncome_2290390e-9d87-4fdb-8ea6-def99c45ec9e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitInterestExpense_d34842de-de55-487f-a57e-9f15714a6726" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefitInterestExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityLineItems_4ff85d59-fa24-4084-a319-b767fd891720" xlink:to="loc_us-gaap_LiabilityForFuturePolicyBenefitInterestExpense_d34842de-de55-487f-a57e-9f15714a6726" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/FuturePolicyBenefitsWeightedAverageRatesDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#FuturePolicyBenefitsWeightedAverageRatesDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/FuturePolicyBenefitsWeightedAverageRatesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityLineItems_92be3c4d-08c7-4b37-a6cd-e36ca62518c2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefitActivityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityTable_861c1ec0-e4cd-4d30-84da-bdeb215e4784" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefitActivityTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityLineItems_92be3c4d-08c7-4b37-a6cd-e36ca62518c2" xlink:to="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityTable_861c1ec0-e4cd-4d30-84da-bdeb215e4784" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_2d2ec4aa-8143-4d38-bc9b-4c2350cbd5f5" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityTable_861c1ec0-e4cd-4d30-84da-bdeb215e4784" xlink:to="loc_srt_ProductOrServiceAxis_2d2ec4aa-8143-4d38-bc9b-4c2350cbd5f5" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_2d2ec4aa-8143-4d38-bc9b-4c2350cbd5f5_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_2d2ec4aa-8143-4d38-bc9b-4c2350cbd5f5" xlink:to="loc_srt_ProductsAndServicesDomain_2d2ec4aa-8143-4d38-bc9b-4c2350cbd5f5_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_df8d2f0e-899d-47e1-ba83-cecf2f1c9fe7" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_2d2ec4aa-8143-4d38-bc9b-4c2350cbd5f5" xlink:to="loc_srt_ProductsAndServicesDomain_df8d2f0e-899d-47e1-ba83-cecf2f1c9fe7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_TraditionalLifeInsuranceMember_4415b985-1fcc-420a-85eb-0554b8bdf12b" xlink:href="fnf-20231231.xsd#fnf_TraditionalLifeInsuranceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_df8d2f0e-899d-47e1-ba83-cecf2f1c9fe7" xlink:to="loc_fnf_TraditionalLifeInsuranceMember_4415b985-1fcc-420a-85eb-0554b8bdf12b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_ImmediateAnnuityMember_f195e8bf-2811-4836-a8fa-234a0ed922f9" xlink:href="fnf-20231231.xsd#fnf_ImmediateAnnuityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_df8d2f0e-899d-47e1-ba83-cecf2f1c9fe7" xlink:to="loc_fnf_ImmediateAnnuityMember_f195e8bf-2811-4836-a8fa-234a0ed922f9" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_PRTMember_83cf93f5-fd67-49e5-9c29-d71e4e75e919" xlink:href="fnf-20231231.xsd#fnf_PRTMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_df8d2f0e-899d-47e1-ba83-cecf2f1c9fe7" xlink:to="loc_fnf_PRTMember_83cf93f5-fd67-49e5-9c29-d71e4e75e919" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitWeightedAverageInterestAccretionRate_331155a8-1cb8-40cf-9673-6facde765a88" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefitWeightedAverageInterestAccretionRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityLineItems_92be3c4d-08c7-4b37-a6cd-e36ca62518c2" xlink:to="loc_us-gaap_LiabilityForFuturePolicyBenefitWeightedAverageInterestAccretionRate_331155a8-1cb8-40cf-9673-6facde765a88" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitCurrentWeightedAverageDiscountRate_fff18890-0306-4720-971e-b709a4e6544e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefitCurrentWeightedAverageDiscountRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityLineItems_92be3c4d-08c7-4b37-a6cd-e36ca62518c2" xlink:to="loc_us-gaap_LiabilityForFuturePolicyBenefitCurrentWeightedAverageDiscountRate_fff18890-0306-4720-971e-b709a4e6544e" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/FuturePolicyBenefitsActualExperienceandExpectedExperienceforMortalityandLapsesDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#FuturePolicyBenefitsActualExperienceandExpectedExperienceforMortalityandLapsesDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/FuturePolicyBenefitsActualExperienceandExpectedExperienceforMortalityandLapsesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityLineItems_37012617-a91c-4ee3-a198-dad28f88389e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefitActivityLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityTable_934c3d3d-116c-499f-8d2e-47652664c16b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilityForFuturePolicyBenefitActivityTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityLineItems_37012617-a91c-4ee3-a198-dad28f88389e" xlink:to="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityTable_934c3d3d-116c-499f-8d2e-47652664c16b" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_LongDurationContractsAssumptionsAxis_15a51852-74a8-483a-9971-c5e62b123f34" xlink:href="fnf-20231231.xsd#fnf_LongDurationContractsAssumptionsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityTable_934c3d3d-116c-499f-8d2e-47652664c16b" xlink:to="loc_fnf_LongDurationContractsAssumptionsAxis_15a51852-74a8-483a-9971-c5e62b123f34" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_LongDurationContractsAssumptionsDomain_15a51852-74a8-483a-9971-c5e62b123f34_default" xlink:href="fnf-20231231.xsd#fnf_LongDurationContractsAssumptionsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_fnf_LongDurationContractsAssumptionsAxis_15a51852-74a8-483a-9971-c5e62b123f34" xlink:to="loc_fnf_LongDurationContractsAssumptionsDomain_15a51852-74a8-483a-9971-c5e62b123f34_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_LongDurationContractsAssumptionsDomain_430f1c83-6919-4500-a30a-8e38e7cf9988" xlink:href="fnf-20231231.xsd#fnf_LongDurationContractsAssumptionsDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_fnf_LongDurationContractsAssumptionsAxis_15a51852-74a8-483a-9971-c5e62b123f34" xlink:to="loc_fnf_LongDurationContractsAssumptionsDomain_430f1c83-6919-4500-a30a-8e38e7cf9988" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_LongDurationContractsAssumptionsActualExperienceMember_8655e062-356f-4575-9f9b-7a5d2101169f" xlink:href="fnf-20231231.xsd#fnf_LongDurationContractsAssumptionsActualExperienceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_LongDurationContractsAssumptionsDomain_430f1c83-6919-4500-a30a-8e38e7cf9988" xlink:to="loc_fnf_LongDurationContractsAssumptionsActualExperienceMember_8655e062-356f-4575-9f9b-7a5d2101169f" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_LongDurationContractsAssumptionsExpectedExperienceMember_f6f48c55-0ecf-423f-bcf7-47033decf349" xlink:href="fnf-20231231.xsd#fnf_LongDurationContractsAssumptionsExpectedExperienceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fnf_LongDurationContractsAssumptionsDomain_430f1c83-6919-4500-a30a-8e38e7cf9988" xlink:to="loc_fnf_LongDurationContractsAssumptionsExpectedExperienceMember_f6f48c55-0ecf-423f-bcf7-47033decf349" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_9d8337ad-d2f0-4520-b5df-ec3fa8f6a790" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityTable_934c3d3d-116c-499f-8d2e-47652664c16b" xlink:to="loc_srt_ProductOrServiceAxis_9d8337ad-d2f0-4520-b5df-ec3fa8f6a790" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_9d8337ad-d2f0-4520-b5df-ec3fa8f6a790_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_9d8337ad-d2f0-4520-b5df-ec3fa8f6a790" xlink:to="loc_srt_ProductsAndServicesDomain_9d8337ad-d2f0-4520-b5df-ec3fa8f6a790_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_1c406dd3-6d27-49aa-a7e4-df2f38becddc" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_9d8337ad-d2f0-4520-b5df-ec3fa8f6a790" xlink:to="loc_srt_ProductsAndServicesDomain_1c406dd3-6d27-49aa-a7e4-df2f38becddc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_TraditionalLifeInsuranceMember_c056b6b6-e6c4-469d-96f3-62cdc984319e" xlink:href="fnf-20231231.xsd#fnf_TraditionalLifeInsuranceMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_1c406dd3-6d27-49aa-a7e4-df2f38becddc" xlink:to="loc_fnf_TraditionalLifeInsuranceMember_c056b6b6-e6c4-469d-96f3-62cdc984319e" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_ImmediateAnnuityMember_325eea31-52f8-4575-b709-9f9b1a4f0d40" xlink:href="fnf-20231231.xsd#fnf_ImmediateAnnuityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_1c406dd3-6d27-49aa-a7e4-df2f38becddc" xlink:to="loc_fnf_ImmediateAnnuityMember_325eea31-52f8-4575-b709-9f9b1a4f0d40" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_PRTMember_5b75a142-4b44-4f0b-bde9-212aed297ec6" xlink:href="fnf-20231231.xsd#fnf_PRTMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_1c406dd3-6d27-49aa-a7e4-df2f38becddc" xlink:to="loc_fnf_PRTMember_5b75a142-4b44-4f0b-bde9-212aed297ec6" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeMortalityRate_47d317ec-eaec-4f21-b379-9ba18e8028fa" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeMortalityRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityLineItems_37012617-a91c-4ee3-a198-dad28f88389e" xlink:to="loc_us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeMortalityRate_47d317ec-eaec-4f21-b379-9ba18e8028fa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeLapseRate_518a0b8f-81b7-48a8-a722-09973d2076f3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeLapseRate"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilityForFuturePolicyBenefitActivityLineItems_37012617-a91c-4ee3-a198-dad28f88389e" xlink:to="loc_us-gaap_LongDurationContractsAssumptionsByProductAndGuaranteeLapseRate_518a0b8f-81b7-48a8-a722-09973d2076f3" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/ScheduleIICondensedFinancialInformationBalanceSheetsParentCompanyDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#ScheduleIICondensedFinancialInformationBalanceSheetsParentCompanyDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/ScheduleIICondensedFinancialInformationBalanceSheetsParentCompanyDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_srt_CondensedBalanceSheetStatementsCaptionsLineItems_586e32aa-4359-43bc-b7ce-dbd0aca0ac47" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_CondensedBalanceSheetStatementsCaptionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CondensedBalanceSheetStatementTable_2170a151-2262-4140-898f-a9c9fae29295" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_CondensedBalanceSheetStatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_srt_CondensedBalanceSheetStatementsCaptionsLineItems_586e32aa-4359-43bc-b7ce-dbd0aca0ac47" xlink:to="loc_srt_CondensedBalanceSheetStatementTable_2170a151-2262-4140-898f-a9c9fae29295" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_8278d3f9-232d-40e3-9c4e-18bce5e3f25b" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_CondensedBalanceSheetStatementTable_2170a151-2262-4140-898f-a9c9fae29295" xlink:to="loc_srt_ConsolidatedEntitiesAxis_8278d3f9-232d-40e3-9c4e-18bce5e3f25b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_8278d3f9-232d-40e3-9c4e-18bce5e3f25b_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_8278d3f9-232d-40e3-9c4e-18bce5e3f25b" xlink:to="loc_srt_ConsolidatedEntitiesDomain_8278d3f9-232d-40e3-9c4e-18bce5e3f25b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_bce2257b-83bf-4d31-867c-8b09cec16174" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_8278d3f9-232d-40e3-9c4e-18bce5e3f25b" xlink:to="loc_srt_ConsolidatedEntitiesDomain_bce2257b-83bf-4d31-867c-8b09cec16174" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ParentCompanyMember_a74112be-2ec1-4662-957c-4591c2a151f9" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ParentCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_bce2257b-83bf-4d31-867c-8b09cec16174" xlink:to="loc_srt_ParentCompanyMember_a74112be-2ec1-4662-957c-4591c2a151f9" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_03167f8e-36fa-49e6-9a08-3e1b77deffad" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_CondensedBalanceSheetStatementTable_2170a151-2262-4140-898f-a9c9fae29295" xlink:to="loc_us-gaap_StatementClassOfStockAxis_03167f8e-36fa-49e6-9a08-3e1b77deffad" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_03167f8e-36fa-49e6-9a08-3e1b77deffad_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_03167f8e-36fa-49e6-9a08-3e1b77deffad" xlink:to="loc_us-gaap_ClassOfStockDomain_03167f8e-36fa-49e6-9a08-3e1b77deffad_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_1fd19200-60ac-49fd-91aa-606563ad1c93" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_03167f8e-36fa-49e6-9a08-3e1b77deffad" xlink:to="loc_us-gaap_ClassOfStockDomain_1fd19200-60ac-49fd-91aa-606563ad1c93" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FidelityNationalFinancialGroupCommonStockMember_1c3b0fd5-b825-4911-8c40-4e5ee1627a46" xlink:href="fnf-20231231.xsd#fnf_FidelityNationalFinancialGroupCommonStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_1fd19200-60ac-49fd-91aa-606563ad1c93" xlink:to="loc_fnf_FidelityNationalFinancialGroupCommonStockMember_1c3b0fd5-b825-4911-8c40-4e5ee1627a46" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsAbstract_72e68d2e-9858-41dc-9361-4f07e7be3271" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AssetsAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedBalanceSheetStatementsCaptionsLineItems_586e32aa-4359-43bc-b7ce-dbd0aca0ac47" xlink:to="loc_us-gaap_AssetsAbstract_72e68d2e-9858-41dc-9361-4f07e7be3271" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_46e18dd4-daa0-41be-86e9-18cc4f578adc" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_72e68d2e-9858-41dc-9361-4f07e7be3271" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_46e18dd4-daa0-41be-86e9-18cc4f578adc" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermInvestments_1589197b-bcc1-4dd0-a9a7-8c3cc46a4289" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShortTermInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_72e68d2e-9858-41dc-9361-4f07e7be3271" xlink:to="loc_us-gaap_ShortTermInvestments_1589197b-bcc1-4dd0-a9a7-8c3cc46a4289" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherShortTermInvestments_b9458c56-ec19-4ebb-8ee7-e2ac3862328d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherShortTermInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_72e68d2e-9858-41dc-9361-4f07e7be3271" xlink:to="loc_us-gaap_OtherShortTermInvestments_b9458c56-ec19-4ebb-8ee7-e2ac3862328d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquitySecuritiesFvNi_aea46526-f6d0-48b2-985f-3e3d6c1af1ad" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquitySecuritiesFvNi"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_72e68d2e-9858-41dc-9361-4f07e7be3271" xlink:to="loc_us-gaap_EquitySecuritiesFvNi_aea46526-f6d0-48b2-985f-3e3d6c1af1ad" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityMethodInvestments_3a6161af-da1e-4656-a478-62ffc0704e8b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_72e68d2e-9858-41dc-9361-4f07e7be3271" xlink:to="loc_us-gaap_EquityMethodInvestments_3a6161af-da1e-4656-a478-62ffc0704e8b" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsAndNotesReceivableNet_8c51bb3d-0a85-4920-b541-36bb30807107" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccountsAndNotesReceivableNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_72e68d2e-9858-41dc-9361-4f07e7be3271" xlink:to="loc_us-gaap_AccountsAndNotesReceivableNet_8c51bb3d-0a85-4920-b541-36bb30807107" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_InvestmentsinSubsidiariesandDuefromSubsidiaries_7da1a646-cf26-43de-b093-4f9cafd6d926" xlink:href="fnf-20231231.xsd#fnf_InvestmentsinSubsidiariesandDuefromSubsidiaries"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_72e68d2e-9858-41dc-9361-4f07e7be3271" xlink:to="loc_fnf_InvestmentsinSubsidiariesandDuefromSubsidiaries_7da1a646-cf26-43de-b093-4f9cafd6d926" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_2c3d50ff-d89a-4345-91bd-163a6883a37c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_72e68d2e-9858-41dc-9361-4f07e7be3271" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_2c3d50ff-d89a-4345-91bd-163a6883a37c" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssets_2fdf3fbf-ebe2-4398-9831-488e9a00ad79" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PrepaidExpenseAndOtherAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AssetsAbstract_72e68d2e-9858-41dc-9361-4f07e7be3271" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssets_2fdf3fbf-ebe2-4398-9831-488e9a00ad79" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_c3199078-560f-432b-a67b-fdeef794594b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Assets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedBalanceSheetStatementsCaptionsLineItems_586e32aa-4359-43bc-b7ce-dbd0aca0ac47" xlink:to="loc_us-gaap_Assets_c3199078-560f-432b-a67b-fdeef794594b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_8cbb3f7a-cfd7-460a-bfae-e49ef8e51a83" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilitiesAndStockholdersEquityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedBalanceSheetStatementsCaptionsLineItems_586e32aa-4359-43bc-b7ce-dbd0aca0ac47" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_8cbb3f7a-cfd7-460a-bfae-e49ef8e51a83" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAbstract_a6010f49-9cc9-48cb-a671-cea5a8197e39" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_8cbb3f7a-cfd7-460a-bfae-e49ef8e51a83" xlink:to="loc_us-gaap_LiabilitiesAbstract_a6010f49-9cc9-48cb-a671-cea5a8197e39" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent_3e4f6f49-ed4a-4f24-87fe-65d4dec3b92e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_a6010f49-9cc9-48cb-a671-cea5a8197e39" xlink:to="loc_us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent_3e4f6f49-ed4a-4f24-87fe-65d4dec3b92e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TaxesPayableCurrentAndNoncurrent_54906b34-e341-47fa-9511-90bcc8d723da" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TaxesPayableCurrentAndNoncurrent"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_a6010f49-9cc9-48cb-a671-cea5a8197e39" xlink:to="loc_us-gaap_TaxesPayableCurrentAndNoncurrent_54906b34-e341-47fa-9511-90bcc8d723da" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_aa435ce7-edc2-41b5-b8d7-9813cc837724" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DeferredIncomeTaxLiabilitiesNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_a6010f49-9cc9-48cb-a671-cea5a8197e39" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilitiesNet_aa435ce7-edc2-41b5-b8d7-9813cc837724" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_118739e3-ee76-4216-92a4-3826d399c638" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAbstract_a6010f49-9cc9-48cb-a671-cea5a8197e39" xlink:to="loc_us-gaap_LongTermDebt_118739e3-ee76-4216-92a4-3826d399c638" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_85260194-257b-490a-8491-79f9c5944cdf" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Liabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_8cbb3f7a-cfd7-460a-bfae-e49ef8e51a83" xlink:to="loc_us-gaap_Liabilities_85260194-257b-490a-8491-79f9c5944cdf" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_4a4acdc1-c146-4518-b648-e4d483624fbb" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_8cbb3f7a-cfd7-460a-bfae-e49ef8e51a83" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_4a4acdc1-c146-4518-b648-e4d483624fbb" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityAbstract_33d432b1-f0df-4654-812d-88d9abee7a25" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_8cbb3f7a-cfd7-460a-bfae-e49ef8e51a83" xlink:to="loc_us-gaap_EquityAbstract_33d432b1-f0df-4654-812d-88d9abee7a25" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_13fa521f-5fc8-4ac3-a40f-dabaf645394d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommonStockValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityAbstract_33d432b1-f0df-4654-812d-88d9abee7a25" xlink:to="loc_us-gaap_CommonStockValue_13fa521f-5fc8-4ac3-a40f-dabaf645394d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockValue_755c5a77-215b-4004-b5d4-4b632e8b4fad" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PreferredStockValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityAbstract_33d432b1-f0df-4654-812d-88d9abee7a25" xlink:to="loc_us-gaap_PreferredStockValue_755c5a77-215b-4004-b5d4-4b632e8b4fad" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapitalCommonStock_6f215a18-1453-4c5c-9a31-175a5047a65f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AdditionalPaidInCapitalCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityAbstract_33d432b1-f0df-4654-812d-88d9abee7a25" xlink:to="loc_us-gaap_AdditionalPaidInCapitalCommonStock_6f215a18-1453-4c5c-9a31-175a5047a65f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_59e7320d-d82f-417d-a0fe-ce53d0866fe8" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityAbstract_33d432b1-f0df-4654-812d-88d9abee7a25" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_59e7320d-d82f-417d-a0fe-ce53d0866fe8" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_1ebd6e27-d6c6-413e-bf7c-d77d4a930ea2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityAbstract_33d432b1-f0df-4654-812d-88d9abee7a25" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_1ebd6e27-d6c6-413e-bf7c-d77d4a930ea2" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockValue_94df7607-4a27-4a5d-a2a1-c62c6ec08393" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TreasuryStockValue"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityAbstract_33d432b1-f0df-4654-812d-88d9abee7a25" xlink:to="loc_us-gaap_TreasuryStockValue_94df7607-4a27-4a5d-a2a1-c62c6ec08393" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_eb0afd6a-505c-4554-97bc-2a37da88caaf" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquityAbstract_8cbb3f7a-cfd7-460a-bfae-e49ef8e51a83" xlink:to="loc_us-gaap_StockholdersEquity_eb0afd6a-505c-4554-97bc-2a37da88caaf" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_944263c7-7b98-4c56-9603-7cc1f1850c75" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedBalanceSheetStatementsCaptionsLineItems_586e32aa-4359-43bc-b7ce-dbd0aca0ac47" xlink:to="loc_us-gaap_LiabilitiesAndStockholdersEquity_944263c7-7b98-4c56-9603-7cc1f1850c75" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonShares_e4a5f757-bd1e-4d11-a4ff-c38df326a90b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TreasuryStockCommonShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedBalanceSheetStatementsCaptionsLineItems_586e32aa-4359-43bc-b7ce-dbd0aca0ac47" xlink:to="loc_us-gaap_TreasuryStockCommonShares_e4a5f757-bd1e-4d11-a4ff-c38df326a90b" xlink:type="arc" order="4"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/ScheduleIICondensedFinancialInformationBalanceSheetsParentCompanyParentheticalDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#ScheduleIICondensedFinancialInformationBalanceSheetsParentCompanyParentheticalDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/ScheduleIICondensedFinancialInformationBalanceSheetsParentCompanyParentheticalDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_srt_CondensedBalanceSheetStatementsCaptionsLineItems_9ae062db-1bb5-4f8c-8f50-ef07515b0f20" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_CondensedBalanceSheetStatementsCaptionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CondensedBalanceSheetStatementTable_c4f5e035-7f3a-4274-bc6f-d84232ae7d1f" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_CondensedBalanceSheetStatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_srt_CondensedBalanceSheetStatementsCaptionsLineItems_9ae062db-1bb5-4f8c-8f50-ef07515b0f20" xlink:to="loc_srt_CondensedBalanceSheetStatementTable_c4f5e035-7f3a-4274-bc6f-d84232ae7d1f" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_f1a6f5c6-e5fd-48eb-89fc-762a0fa185c1" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_CondensedBalanceSheetStatementTable_c4f5e035-7f3a-4274-bc6f-d84232ae7d1f" xlink:to="loc_srt_ConsolidatedEntitiesAxis_f1a6f5c6-e5fd-48eb-89fc-762a0fa185c1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_f1a6f5c6-e5fd-48eb-89fc-762a0fa185c1_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_f1a6f5c6-e5fd-48eb-89fc-762a0fa185c1" xlink:to="loc_srt_ConsolidatedEntitiesDomain_f1a6f5c6-e5fd-48eb-89fc-762a0fa185c1_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_9167f4c2-cfa9-45db-aad2-9b617041d0be" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_f1a6f5c6-e5fd-48eb-89fc-762a0fa185c1" xlink:to="loc_srt_ConsolidatedEntitiesDomain_9167f4c2-cfa9-45db-aad2-9b617041d0be" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ParentCompanyMember_fa75a472-ab40-4b00-8038-89361c3031c6" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ParentCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_9167f4c2-cfa9-45db-aad2-9b617041d0be" xlink:to="loc_srt_ParentCompanyMember_fa75a472-ab40-4b00-8038-89361c3031c6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockParOrStatedValuePerShare_c191cf06-4b06-416e-80da-49c9dff5d570" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommonStockParOrStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedBalanceSheetStatementsCaptionsLineItems_9ae062db-1bb5-4f8c-8f50-ef07515b0f20" xlink:to="loc_us-gaap_CommonStockParOrStatedValuePerShare_c191cf06-4b06-416e-80da-49c9dff5d570" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesAuthorized_2cba3428-dae4-4c92-a706-f6119f7f6d6e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommonStockSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedBalanceSheetStatementsCaptionsLineItems_9ae062db-1bb5-4f8c-8f50-ef07515b0f20" xlink:to="loc_us-gaap_CommonStockSharesAuthorized_2cba3428-dae4-4c92-a706-f6119f7f6d6e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesOutstanding_97eec687-ea47-4d7c-9397-e1fb92d63f36" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommonStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedBalanceSheetStatementsCaptionsLineItems_9ae062db-1bb5-4f8c-8f50-ef07515b0f20" xlink:to="loc_us-gaap_CommonStockSharesOutstanding_97eec687-ea47-4d7c-9397-e1fb92d63f36" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockSharesIssued_9e45b736-564b-4357-9746-7379ed7ee089" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CommonStockSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedBalanceSheetStatementsCaptionsLineItems_9ae062db-1bb5-4f8c-8f50-ef07515b0f20" xlink:to="loc_us-gaap_CommonStockSharesIssued_9e45b736-564b-4357-9746-7379ed7ee089" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockParOrStatedValuePerShare_23260b81-7c48-47c8-8546-2ab739659afd" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PreferredStockParOrStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedBalanceSheetStatementsCaptionsLineItems_9ae062db-1bb5-4f8c-8f50-ef07515b0f20" xlink:to="loc_us-gaap_PreferredStockParOrStatedValuePerShare_23260b81-7c48-47c8-8546-2ab739659afd" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockSharesAuthorized_8bb35156-eafb-412f-87f6-2f02a453f06c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PreferredStockSharesAuthorized"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedBalanceSheetStatementsCaptionsLineItems_9ae062db-1bb5-4f8c-8f50-ef07515b0f20" xlink:to="loc_us-gaap_PreferredStockSharesAuthorized_8bb35156-eafb-412f-87f6-2f02a453f06c" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockSharesIssued_cd991af6-5802-4501-ba49-7bfbbf451797" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PreferredStockSharesIssued"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedBalanceSheetStatementsCaptionsLineItems_9ae062db-1bb5-4f8c-8f50-ef07515b0f20" xlink:to="loc_us-gaap_PreferredStockSharesIssued_cd991af6-5802-4501-ba49-7bfbbf451797" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockSharesOutstanding_23f7a05d-b275-447f-8814-c6d2bfe44178" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PreferredStockSharesOutstanding"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedBalanceSheetStatementsCaptionsLineItems_9ae062db-1bb5-4f8c-8f50-ef07515b0f20" xlink:to="loc_us-gaap_PreferredStockSharesOutstanding_23f7a05d-b275-447f-8814-c6d2bfe44178" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_TreasuryStockCommonShares_b9fc5fd0-6313-4c17-a777-c1195f535675" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_TreasuryStockCommonShares"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedBalanceSheetStatementsCaptionsLineItems_9ae062db-1bb5-4f8c-8f50-ef07515b0f20" xlink:to="loc_us-gaap_TreasuryStockCommonShares_b9fc5fd0-6313-4c17-a777-c1195f535675" xlink:type="arc" order="8"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/ScheduleIICondensedFinancialInformationStatementofEarningsParentCompanyDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#ScheduleIICondensedFinancialInformationStatementofEarningsParentCompanyDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/ScheduleIICondensedFinancialInformationStatementofEarningsParentCompanyDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_srt_CondensedIncomeStatementsCaptionsLineItems_0d765b64-7226-477c-884f-c1a358ce9371" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_CondensedIncomeStatementsCaptionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CondensedIncomeStatementTable_dee82034-0763-48e6-9654-d226cc2e5d86" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_CondensedIncomeStatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_srt_CondensedIncomeStatementsCaptionsLineItems_0d765b64-7226-477c-884f-c1a358ce9371" xlink:to="loc_srt_CondensedIncomeStatementTable_dee82034-0763-48e6-9654-d226cc2e5d86" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_2ea9d45d-3896-4725-891a-49c8b6061562" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_CondensedIncomeStatementTable_dee82034-0763-48e6-9654-d226cc2e5d86" xlink:to="loc_srt_ConsolidatedEntitiesAxis_2ea9d45d-3896-4725-891a-49c8b6061562" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_2ea9d45d-3896-4725-891a-49c8b6061562_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_2ea9d45d-3896-4725-891a-49c8b6061562" xlink:to="loc_srt_ConsolidatedEntitiesDomain_2ea9d45d-3896-4725-891a-49c8b6061562_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_d5dfc940-b42f-4961-b304-fbb4a946fc8d" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_2ea9d45d-3896-4725-891a-49c8b6061562" xlink:to="loc_srt_ConsolidatedEntitiesDomain_d5dfc940-b42f-4961-b304-fbb4a946fc8d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ParentCompanyMember_f7ea8436-26c7-4cb8-8dc6-401dde8881a6" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ParentCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_d5dfc940-b42f-4961-b304-fbb4a946fc8d" xlink:to="loc_srt_ParentCompanyMember_f7ea8436-26c7-4cb8-8dc6-401dde8881a6" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementEquityComponentsAxis_c0c00e92-c039-4087-bffd-16f8ef080d7e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementEquityComponentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_CondensedIncomeStatementTable_dee82034-0763-48e6-9654-d226cc2e5d86" xlink:to="loc_us-gaap_StatementEquityComponentsAxis_c0c00e92-c039-4087-bffd-16f8ef080d7e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_c0c00e92-c039-4087-bffd-16f8ef080d7e_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_c0c00e92-c039-4087-bffd-16f8ef080d7e" xlink:to="loc_us-gaap_EquityComponentDomain_c0c00e92-c039-4087-bffd-16f8ef080d7e_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EquityComponentDomain_9d4dca78-c69a-419e-b82c-3ae9cd5e8b7b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_EquityComponentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementEquityComponentsAxis_c0c00e92-c039-4087-bffd-16f8ef080d7e" xlink:to="loc_us-gaap_EquityComponentDomain_9d4dca78-c69a-419e-b82c-3ae9cd5e8b7b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsMember_a25f3e7f-c08e-415c-b8f0-40bbe09bb08d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RetainedEarningsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_EquityComponentDomain_9d4dca78-c69a-419e-b82c-3ae9cd5e8b7b" xlink:to="loc_us-gaap_RetainedEarningsMember_a25f3e7f-c08e-415c-b8f0-40bbe09bb08d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenuesAbstract_fb4022b6-2f96-4f6b-ba8d-0e923ad50ee4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RevenuesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedIncomeStatementsCaptionsLineItems_0d765b64-7226-477c-884f-c1a358ce9371" xlink:to="loc_us-gaap_RevenuesAbstract_fb4022b6-2f96-4f6b-ba8d-0e923ad50ee4" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InsuranceCommissionsAndFees_2fa155f0-71cc-4d67-9cc1-e580faba08ee" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InsuranceCommissionsAndFees"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesAbstract_fb4022b6-2f96-4f6b-ba8d-0e923ad50ee4" xlink:to="loc_us-gaap_InsuranceCommissionsAndFees_2fa155f0-71cc-4d67-9cc1-e580faba08ee" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_NetInvestmentIncomeAndGainLossOnInvestments_66ba9136-5c39-4b58-8830-e3258de6d8dc" xlink:href="fnf-20231231.xsd#fnf_NetInvestmentIncomeAndGainLossOnInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesAbstract_fb4022b6-2f96-4f6b-ba8d-0e923ad50ee4" xlink:to="loc_fnf_NetInvestmentIncomeAndGainLossOnInvestments_66ba9136-5c39-4b58-8830-e3258de6d8dc" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnInvestments_eab29e27-4ea1-4bc9-9e9f-53c183b1cb4f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GainLossOnInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesAbstract_fb4022b6-2f96-4f6b-ba8d-0e923ad50ee4" xlink:to="loc_us-gaap_GainLossOnInvestments_eab29e27-4ea1-4bc9-9e9f-53c183b1cb4f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_1231175e-1b65-4490-97e7-7c357e96ad84" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_Revenues"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_RevenuesAbstract_fb4022b6-2f96-4f6b-ba8d-0e923ad50ee4" xlink:to="loc_us-gaap_Revenues_1231175e-1b65-4490-97e7-7c357e96ad84" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostsAndExpensesAbstract_fc2e2eef-1086-40f1-9874-64b63cc1d774" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CostsAndExpensesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedIncomeStatementsCaptionsLineItems_0d765b64-7226-477c-884f-c1a358ce9371" xlink:to="loc_us-gaap_CostsAndExpensesAbstract_fc2e2eef-1086-40f1-9874-64b63cc1d774" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LaborAndRelatedExpense_19d3a762-88d9-4b8b-9ebe-1d8b4374da9c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LaborAndRelatedExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_fc2e2eef-1086-40f1-9874-64b63cc1d774" xlink:to="loc_us-gaap_LaborAndRelatedExpense_19d3a762-88d9-4b8b-9ebe-1d8b4374da9c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCostAndExpenseOperating_208d0276-77ec-483a-ae64-54bc7f1198b9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_OtherCostAndExpenseOperating"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_fc2e2eef-1086-40f1-9874-64b63cc1d774" xlink:to="loc_us-gaap_OtherCostAndExpenseOperating_208d0276-77ec-483a-ae64-54bc7f1198b9" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpense_247a1836-af89-44e1-a1fd-aa6279ec0e13" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InterestExpense"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_fc2e2eef-1086-40f1-9874-64b63cc1d774" xlink:to="loc_us-gaap_InterestExpense_247a1836-af89-44e1-a1fd-aa6279ec0e13" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BenefitsLossesAndExpenses_02c236f5-1721-4c2c-977a-843e2c8caed0" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_BenefitsLossesAndExpenses"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CostsAndExpensesAbstract_fc2e2eef-1086-40f1-9874-64b63cc1d774" xlink:to="loc_us-gaap_BenefitsLossesAndExpenses_02c236f5-1721-4c2c-977a-843e2c8caed0" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_11523a25-3da6-469f-a4bd-41e262cde5a7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedIncomeStatementsCaptionsLineItems_0d765b64-7226-477c-884f-c1a358ce9371" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_11523a25-3da6-469f-a4bd-41e262cde5a7" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_eaf61253-1bf9-42b7-a500-38279c325993" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedIncomeStatementsCaptionsLineItems_0d765b64-7226-477c-884f-c1a358ce9371" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_eaf61253-1bf9-42b7-a500-38279c325993" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_IncomeLossFromContinuingOperationsBeforeIncomeLossinSubsidiariesNetofIncomeTax_8272103e-368d-4862-ae36-68951b805720" xlink:href="fnf-20231231.xsd#fnf_IncomeLossFromContinuingOperationsBeforeIncomeLossinSubsidiariesNetofIncomeTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedIncomeStatementsCaptionsLineItems_0d765b64-7226-477c-884f-c1a358ce9371" xlink:to="loc_fnf_IncomeLossFromContinuingOperationsBeforeIncomeLossinSubsidiariesNetofIncomeTax_8272103e-368d-4862-ae36-68951b805720" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_IncomeLossfromSubsidiariesAndDiscontinuedOperationsNetofTax_d3d2ece0-7d00-4948-b7ec-dc4ceef57959" xlink:href="fnf-20231231.xsd#fnf_IncomeLossfromSubsidiariesAndDiscontinuedOperationsNetofTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedIncomeStatementsCaptionsLineItems_0d765b64-7226-477c-884f-c1a358ce9371" xlink:to="loc_fnf_IncomeLossfromSubsidiariesAndDiscontinuedOperationsNetofTax_d3d2ece0-7d00-4948-b7ec-dc4ceef57959" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_d524092f-6a04-4032-a62b-36349f21112e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedIncomeStatementsCaptionsLineItems_0d765b64-7226-477c-884f-c1a358ce9371" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest_d524092f-6a04-4032-a62b-36349f21112e" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax_54ee2fe0-2eb7-4e33-98d2-89c92bf7e98b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedIncomeStatementsCaptionsLineItems_0d765b64-7226-477c-884f-c1a358ce9371" xlink:to="loc_us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax_54ee2fe0-2eb7-4e33-98d2-89c92bf7e98b" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_df2dc7e5-fab1-4d3b-898e-f401e0df0a53" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedIncomeStatementsCaptionsLineItems_0d765b64-7226-477c-884f-c1a358ce9371" xlink:to="loc_us-gaap_NetIncomeLoss_df2dc7e5-fab1-4d3b-898e-f401e0df0a53" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_061d3cda-c385-4c57-8d59-37e9172bd2e4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedIncomeStatementsCaptionsLineItems_0d765b64-7226-477c-884f-c1a358ce9371" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_061d3cda-c385-4c57-8d59-37e9172bd2e4" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCommonStockCash_534b1902-b5ac-4268-b08c-e49ee6ddbb07" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DividendsCommonStockCash"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedIncomeStatementsCaptionsLineItems_0d765b64-7226-477c-884f-c1a358ce9371" xlink:to="loc_us-gaap_DividendsCommonStockCash_534b1902-b5ac-4268-b08c-e49ee6ddbb07" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DividendsCommonStockStock_fd7c870d-9c7d-4761-bd15-534522f9815b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DividendsCommonStockStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedIncomeStatementsCaptionsLineItems_0d765b64-7226-477c-884f-c1a358ce9371" xlink:to="loc_us-gaap_DividendsCommonStockStock_fd7c870d-9c7d-4761-bd15-534522f9815b" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_6d74e832-6d9c-405e-8621-80b90f58e5d2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_6acfb543-dc0c-4a94-8252-02ac8163005e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/ScheduleIICondensedFinancialInformationStatementofCashFlowParentCompanyDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#ScheduleIICondensedFinancialInformationStatementofCashFlowParentCompanyDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/ScheduleIICondensedFinancialInformationStatementofCashFlowParentCompanyDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_srt_CondensedCashFlowStatementsCaptionsLineItems_4c5ec0ac-f487-49a5-94e8-774fa9083146" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_CondensedCashFlowStatementsCaptionsLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_CondensedCashFlowStatementTable_c5e2c262-e4dc-404e-abac-c3b735031707" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_CondensedCashFlowStatementTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_srt_CondensedCashFlowStatementsCaptionsLineItems_4c5ec0ac-f487-49a5-94e8-774fa9083146" xlink:to="loc_srt_CondensedCashFlowStatementTable_c5e2c262-e4dc-404e-abac-c3b735031707" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_828be6c9-a848-4393-8ebb-3c5153b07523" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_CondensedCashFlowStatementTable_c5e2c262-e4dc-404e-abac-c3b735031707" xlink:to="loc_srt_ConsolidatedEntitiesAxis_828be6c9-a848-4393-8ebb-3c5153b07523" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_828be6c9-a848-4393-8ebb-3c5153b07523_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_828be6c9-a848-4393-8ebb-3c5153b07523" xlink:to="loc_srt_ConsolidatedEntitiesDomain_828be6c9-a848-4393-8ebb-3c5153b07523_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_eef1e3a3-c0ea-4642-bb7f-7daf7c5d71e2" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_828be6c9-a848-4393-8ebb-3c5153b07523" xlink:to="loc_srt_ConsolidatedEntitiesDomain_eef1e3a3-c0ea-4642-bb7f-7daf7c5d71e2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ParentCompanyMember_6e3b6ff7-1aa2-4118-8f9c-5cbfb0b0bb7b" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ParentCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_eef1e3a3-c0ea-4642-bb7f-7daf7c5d71e2" xlink:to="loc_srt_ParentCompanyMember_6e3b6ff7-1aa2-4118-8f9c-5cbfb0b0bb7b" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_14360307-5f25-4314-b80b-3785efa86de2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedCashFlowStatementsCaptionsLineItems_4c5ec0ac-f487-49a5-94e8-774fa9083146" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_14360307-5f25-4314-b80b-3785efa86de2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_6065599c-795b-4174-bde2-a729924a26d7" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetIncomeLoss"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_14360307-5f25-4314-b80b-3785efa86de2" xlink:to="loc_us-gaap_NetIncomeLoss_6065599c-795b-4174-bde2-a729924a26d7" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_b7f63e4f-6baf-4a17-a19e-a66282f55699" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_14360307-5f25-4314-b80b-3785efa86de2" xlink:to="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_b7f63e4f-6baf-4a17-a19e-a66282f55699" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromEquityMethodInvestments_cb4de9ab-7e87-4b9e-8e19-01a567f76cd2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeLossFromEquityMethodInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_b7f63e4f-6baf-4a17-a19e-a66282f55699" xlink:to="loc_us-gaap_IncomeLossFromEquityMethodInvestments_cb4de9ab-7e87-4b9e-8e19-01a567f76cd2" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromSubsidiariesNetOfTax_7386d6db-a339-47dc-930a-c5df9a4f333d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeLossFromSubsidiariesNetOfTax"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_b7f63e4f-6baf-4a17-a19e-a66282f55699" xlink:to="loc_us-gaap_IncomeLossFromSubsidiariesNetOfTax_7386d6db-a339-47dc-930a-c5df9a4f333d" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_bff558bf-52f4-4c28-ba9e-ca13d54e126d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_b7f63e4f-6baf-4a17-a19e-a66282f55699" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_bff558bf-52f4-4c28-ba9e-ca13d54e126d" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensation_d26cab7f-52d5-4f68-8b46-32e9f44c9151" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_b7f63e4f-6baf-4a17-a19e-a66282f55699" xlink:to="loc_us-gaap_ShareBasedCompensation_d26cab7f-52d5-4f68-8b46-32e9f44c9151" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable_76d328b2-794b-47ae-8686-5541c302d8fe" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_b7f63e4f-6baf-4a17-a19e-a66282f55699" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable_76d328b2-794b-47ae-8686-5541c302d8fe" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_04f1b8d3-5009-47ee-9700-a0d2b542c5b2" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_b7f63e4f-6baf-4a17-a19e-a66282f55699" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_04f1b8d3-5009-47ee-9700-a0d2b542c5b2" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_IncreaseDecreaseInAccountsPayableAccruedLiabilitiesDeferredRevenueAndOtherOperatingLiabilities_3492e70e-2f19-4522-8289-4b72440a4847" xlink:href="fnf-20231231.xsd#fnf_IncreaseDecreaseInAccountsPayableAccruedLiabilitiesDeferredRevenueAndOtherOperatingLiabilities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_b7f63e4f-6baf-4a17-a19e-a66282f55699" xlink:to="loc_fnf_IncreaseDecreaseInAccountsPayableAccruedLiabilitiesDeferredRevenueAndOtherOperatingLiabilities_3492e70e-2f19-4522-8289-4b72440a4847" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1d9e2c51-e35d-478e-bb2e-106578784c4f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_14360307-5f25-4314-b80b-3785efa86de2" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_1d9e2c51-e35d-478e-bb2e-106578784c4f" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_af36d606-ff81-49c4-8453-f8a3822662e3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedCashFlowStatementsCaptionsLineItems_4c5ec0ac-f487-49a5-94e8-774fa9083146" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_af36d606-ff81-49c4-8453-f8a3822662e3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt_6f5f3bb5-1c66-41c7-9af4-b04dcb28a20e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_af36d606-ff81-49c4-8453-f8a3822662e3" xlink:to="loc_us-gaap_PaymentsToAcquireAvailableForSaleSecuritiesDebt_6f5f3bb5-1c66-41c7-9af4-b04dcb28a20e" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForProceedsFromShortTermInvestments_a7a8f603-fcd5-4d38-a19c-ecd4801c1450" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsForProceedsFromShortTermInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_af36d606-ff81-49c4-8453-f8a3822662e3" xlink:to="loc_us-gaap_PaymentsForProceedsFromShortTermInvestments_a7a8f603-fcd5-4d38-a19c-ecd4801c1450" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireNotesReceivable_f37119ae-6baf-49b9-8d6d-f7f94e0421de" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsToAcquireNotesReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_af36d606-ff81-49c4-8453-f8a3822662e3" xlink:to="loc_us-gaap_PaymentsToAcquireNotesReceivable_f37119ae-6baf-49b9-8d6d-f7f94e0421de" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromCollectionOfNotesReceivable_1fb0f2af-6155-4c82-992e-654d712a73e6" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromCollectionOfNotesReceivable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_af36d606-ff81-49c4-8453-f8a3822662e3" xlink:to="loc_us-gaap_ProceedsFromCollectionOfNotesReceivable_1fb0f2af-6155-4c82-992e-654d712a73e6" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_c5ed6338-6c75-4ea4-88ec-4d9cecd90a3e" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_af36d606-ff81-49c4-8453-f8a3822662e3" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_c5ed6338-6c75-4ea4-88ec-4d9cecd90a3e" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_802cd5b7-4fd0-4496-89a1-ee0eb6cfe727" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedCashFlowStatementsCaptionsLineItems_4c5ec0ac-f487-49a5-94e8-774fa9083146" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_802cd5b7-4fd0-4496-89a1-ee0eb6cfe727" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_5f37bb89-adb1-421c-b769-c3309249820c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_802cd5b7-4fd0-4496-89a1-ee0eb6cfe727" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfLongTermDebt_5f37bb89-adb1-421c-b769-c3309249820c" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfLongTermDebt_cd47484b-c6f5-4af0-9b28-f245992dff42" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RepaymentsOfLongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_802cd5b7-4fd0-4496-89a1-ee0eb6cfe727" xlink:to="loc_us-gaap_RepaymentsOfLongTermDebt_cd47484b-c6f5-4af0-9b28-f245992dff42" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDebtIssuanceCosts_cfc085ec-f145-4444-a60c-7ca328611972" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsOfDebtIssuanceCosts"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_802cd5b7-4fd0-4496-89a1-ee0eb6cfe727" xlink:to="loc_us-gaap_PaymentsOfDebtIssuanceCosts_cfc085ec-f145-4444-a60c-7ca328611972" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfDividendsCommonStock_aef99308-e118-40f6-b95c-d263ac29f5b9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsOfDividendsCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_802cd5b7-4fd0-4496-89a1-ee0eb6cfe727" xlink:to="loc_us-gaap_PaymentsOfDividendsCommonStock_aef99308-e118-40f6-b95c-d263ac29f5b9" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_abadbf0c-d004-4f46-8400-cdf89f0f3969" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_802cd5b7-4fd0-4496-89a1-ee0eb6cfe727" xlink:to="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_abadbf0c-d004-4f46-8400-cdf89f0f3969" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromStockOptionsExercised_cf15349f-7fc7-42c1-a644-f0d7e766afec" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ProceedsFromStockOptionsExercised"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_802cd5b7-4fd0-4496-89a1-ee0eb6cfe727" xlink:to="loc_us-gaap_ProceedsFromStockOptionsExercised_cf15349f-7fc7-42c1-a644-f0d7e766afec" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_fa3a4c29-0e6c-409f-849e-21ff41d6eb94" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_802cd5b7-4fd0-4496-89a1-ee0eb6cfe727" xlink:to="loc_us-gaap_PaymentsRelatedToTaxWithholdingForShareBasedCompensation_fa3a4c29-0e6c-409f-849e-21ff41d6eb94" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToMinorityShareholders_94c35b37-6e39-4217-b48d-e7288e28ba3b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PaymentsToMinorityShareholders"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_802cd5b7-4fd0-4496-89a1-ee0eb6cfe727" xlink:to="loc_us-gaap_PaymentsToMinorityShareholders_94c35b37-6e39-4217-b48d-e7288e28ba3b" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_ProceedsFromDividendsFromSubsidiaries_1c831c58-4f51-49a5-a077-2110cfd3076f" xlink:href="fnf-20231231.xsd#fnf_ProceedsFromDividendsFromSubsidiaries"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_802cd5b7-4fd0-4496-89a1-ee0eb6cfe727" xlink:to="loc_fnf_ProceedsFromDividendsFromSubsidiaries_1c831c58-4f51-49a5-a077-2110cfd3076f" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_9cf6cc0d-af21-4ad5-9c1b-3947c788028c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_802cd5b7-4fd0-4496-89a1-ee0eb6cfe727" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_9cf6cc0d-af21-4ad5-9c1b-3947c788028c" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_4de65c72-d387-4d3a-8b2d-e63e81070d02" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedCashFlowStatementsCaptionsLineItems_4c5ec0ac-f487-49a5-94e8-774fa9083146" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_4de65c72-d387-4d3a-8b2d-e63e81070d02" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_0320dc4b-720f-4fd9-ad1b-c81e3a30fe03" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_CondensedCashFlowStatementsCaptionsLineItems_4c5ec0ac-f487-49a5-94e8-774fa9083146" xlink:to="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_0320dc4b-720f-4fd9-ad1b-c81e3a30fe03" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_a6ae3ef5-335e-4cdc-ad02-d15f2f3416b9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/ScheduleIICondensedFinancialInformationNotestoFinancialStatementsParentCompanyDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#ScheduleIICondensedFinancialInformationNotestoFinancialStatementsParentCompanyDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/ScheduleIICondensedFinancialInformationNotestoFinancialStatementsParentCompanyDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentLineItems_7d81b4ba-bfd9-49ba-bc19-5e7fc6ed75c9" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentTable_d9afcd26-11f1-4a39-acd6-ac4905e34a54" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7d81b4ba-bfd9-49ba-bc19-5e7fc6ed75c9" xlink:to="loc_us-gaap_DebtInstrumentTable_d9afcd26-11f1-4a39-acd6-ac4905e34a54" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesAxis_e9247f56-a43a-481b-a06d-3ab81ade907f" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidatedEntitiesAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_d9afcd26-11f1-4a39-acd6-ac4905e34a54" xlink:to="loc_srt_ConsolidatedEntitiesAxis_e9247f56-a43a-481b-a06d-3ab81ade907f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_e9247f56-a43a-481b-a06d-3ab81ade907f_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ConsolidatedEntitiesAxis_e9247f56-a43a-481b-a06d-3ab81ade907f" xlink:to="loc_srt_ConsolidatedEntitiesDomain_e9247f56-a43a-481b-a06d-3ab81ade907f_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ConsolidatedEntitiesDomain_9ff1523c-f42d-472a-93e4-56017d33199f" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ConsolidatedEntitiesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ConsolidatedEntitiesAxis_e9247f56-a43a-481b-a06d-3ab81ade907f" xlink:to="loc_srt_ConsolidatedEntitiesDomain_9ff1523c-f42d-472a-93e4-56017d33199f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ParentCompanyMember_39e2f279-c8ae-45e9-924a-7cab17d5cba2" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ParentCompanyMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ConsolidatedEntitiesDomain_9ff1523c-f42d-472a-93e4-56017d33199f" xlink:to="loc_srt_ParentCompanyMember_39e2f279-c8ae-45e9-924a-7cab17d5cba2" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityAxis_434dc6cc-495c-4b5a-a00b-1afadcb2608a" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CreditFacilityAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_d9afcd26-11f1-4a39-acd6-ac4905e34a54" xlink:to="loc_us-gaap_CreditFacilityAxis_434dc6cc-495c-4b5a-a00b-1afadcb2608a" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_434dc6cc-495c-4b5a-a00b-1afadcb2608a_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_CreditFacilityAxis_434dc6cc-495c-4b5a-a00b-1afadcb2608a" xlink:to="loc_us-gaap_CreditFacilityDomain_434dc6cc-495c-4b5a-a00b-1afadcb2608a_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CreditFacilityDomain_d011fceb-1987-45b9-9ff4-ae2c50906fcf" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CreditFacilityDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_CreditFacilityAxis_434dc6cc-495c-4b5a-a00b-1afadcb2608a" xlink:to="loc_us-gaap_CreditFacilityDomain_d011fceb-1987-45b9-9ff4-ae2c50906fcf" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_c2fed366-cdd0-4b1a-acdf-81502abdce01" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_RevolvingCreditFacilityMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_CreditFacilityDomain_d011fceb-1987-45b9-9ff4-ae2c50906fcf" xlink:to="loc_us-gaap_RevolvingCreditFacilityMember_c2fed366-cdd0-4b1a-acdf-81502abdce01" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentAxis_1fa6f3d7-216b-4524-b01b-f85ea6626516" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_d9afcd26-11f1-4a39-acd6-ac4905e34a54" xlink:to="loc_us-gaap_DebtInstrumentAxis_1fa6f3d7-216b-4524-b01b-f85ea6626516" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_1fa6f3d7-216b-4524-b01b-f85ea6626516_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_DebtInstrumentAxis_1fa6f3d7-216b-4524-b01b-f85ea6626516" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_1fa6f3d7-216b-4524-b01b-f85ea6626516_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_7232cbce-82ec-4c43-b07e-89a644d3795b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentNameDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_DebtInstrumentAxis_1fa6f3d7-216b-4524-b01b-f85ea6626516" xlink:to="loc_us-gaap_DebtInstrumentNameDomain_7232cbce-82ec-4c43-b07e-89a644d3795b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FourPointFiveZeroPercentUnsecuredNotesDueAugust2028Member_ce9e09e7-a7a0-486e-bcfb-efba2661047d" xlink:href="fnf-20231231.xsd#fnf_FourPointFiveZeroPercentUnsecuredNotesDueAugust2028Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7232cbce-82ec-4c43-b07e-89a644d3795b" xlink:to="loc_fnf_FourPointFiveZeroPercentUnsecuredNotesDueAugust2028Member_ce9e09e7-a7a0-486e-bcfb-efba2661047d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_ThreePointFourZeroPercentUnsecuredNotesDueSeptember2022Member_4b849adc-5d4e-4214-9fd9-ca06e918cb7b" xlink:href="fnf-20231231.xsd#fnf_ThreePointFourZeroPercentUnsecuredNotesDueSeptember2022Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7232cbce-82ec-4c43-b07e-89a644d3795b" xlink:to="loc_fnf_ThreePointFourZeroPercentUnsecuredNotesDueSeptember2022Member_4b849adc-5d4e-4214-9fd9-ca06e918cb7b" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_A245SeniorNotesDueMarch2031Member_32c4a2f8-0cb2-4801-bbc7-63be30a2ac67" xlink:href="fnf-20231231.xsd#fnf_A245SeniorNotesDueMarch2031Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7232cbce-82ec-4c43-b07e-89a644d3795b" xlink:to="loc_fnf_A245SeniorNotesDueMarch2031Member_32c4a2f8-0cb2-4801-bbc7-63be30a2ac67" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_A320SeniorNotesMember_18bb2bbe-e84a-4fbb-ae88-f4bb1c9f95cd" xlink:href="fnf-20231231.xsd#fnf_A320SeniorNotesMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7232cbce-82ec-4c43-b07e-89a644d3795b" xlink:to="loc_fnf_A320SeniorNotesMember_18bb2bbe-e84a-4fbb-ae88-f4bb1c9f95cd" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_RevolvingCreditFacilityDueApril2022Member_956b1cab-21d7-43cf-aef1-c969d3ecf7c5" xlink:href="fnf-20231231.xsd#fnf_RevolvingCreditFacilityDueApril2022Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_7232cbce-82ec-4c43-b07e-89a644d3795b" xlink:to="loc_fnf_RevolvingCreditFacilityDueApril2022Member_956b1cab-21d7-43cf-aef1-c969d3ecf7c5" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeAxis_29d604bb-612c-4817-ac78-0f53af820e5b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_d9afcd26-11f1-4a39-acd6-ac4905e34a54" xlink:to="loc_us-gaap_LongtermDebtTypeAxis_29d604bb-612c-4817-ac78-0f53af820e5b" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_29d604bb-612c-4817-ac78-0f53af820e5b_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_29d604bb-612c-4817-ac78-0f53af820e5b" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_29d604bb-612c-4817-ac78-0f53af820e5b_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongtermDebtTypeDomain_44c0c661-75b2-47b7-9d15-5f4ae66d41b1" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongtermDebtTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_LongtermDebtTypeAxis_29d604bb-612c-4817-ac78-0f53af820e5b" xlink:to="loc_us-gaap_LongtermDebtTypeDomain_44c0c661-75b2-47b7-9d15-5f4ae66d41b1" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditMember_7266fa50-7275-437c-a359-02c292249e2c" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCreditMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_LongtermDebtTypeDomain_44c0c661-75b2-47b7-9d15-5f4ae66d41b1" xlink:to="loc_us-gaap_LineOfCreditMember_7266fa50-7275-437c-a359-02c292249e2c" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementClassOfStockAxis_9ee0a473-1d77-4b4a-a77c-0159c870fe59" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementClassOfStockAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_d9afcd26-11f1-4a39-acd6-ac4905e34a54" xlink:to="loc_us-gaap_StatementClassOfStockAxis_9ee0a473-1d77-4b4a-a77c-0159c870fe59" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_9ee0a473-1d77-4b4a-a77c-0159c870fe59_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementClassOfStockAxis_9ee0a473-1d77-4b4a-a77c-0159c870fe59" xlink:to="loc_us-gaap_ClassOfStockDomain_9ee0a473-1d77-4b4a-a77c-0159c870fe59_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ClassOfStockDomain_306940e1-b268-4ce8-aeb6-09c33a59e421" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ClassOfStockDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementClassOfStockAxis_9ee0a473-1d77-4b4a-a77c-0159c870fe59" xlink:to="loc_us-gaap_ClassOfStockDomain_306940e1-b268-4ce8-aeb6-09c33a59e421" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_A6875SeriesAMandatoryConvertiblePreferredStockMember_7ee56fc9-1a21-4f22-88e0-ba8880a8ff3d" xlink:href="fnf-20231231.xsd#fnf_A6875SeriesAMandatoryConvertiblePreferredStockMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ClassOfStockDomain_306940e1-b268-4ce8-aeb6-09c33a59e421" xlink:to="loc_fnf_A6875SeriesAMandatoryConvertiblePreferredStockMember_7ee56fc9-1a21-4f22-88e0-ba8880a8ff3d" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeAxis_b94d823d-f168-4158-8bb2-e4343e509865" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SubsequentEventTypeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_d9afcd26-11f1-4a39-acd6-ac4905e34a54" xlink:to="loc_us-gaap_SubsequentEventTypeAxis_b94d823d-f168-4158-8bb2-e4343e509865" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_b94d823d-f168-4158-8bb2-e4343e509865_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_b94d823d-f168-4158-8bb2-e4343e509865" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_b94d823d-f168-4158-8bb2-e4343e509865_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventTypeDomain_3b647b51-134d-48c1-abd6-3352cb09a78f" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SubsequentEventTypeDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_SubsequentEventTypeAxis_b94d823d-f168-4158-8bb2-e4343e509865" xlink:to="loc_us-gaap_SubsequentEventTypeDomain_3b647b51-134d-48c1-abd6-3352cb09a78f" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SubsequentEventMember_94346c35-eee8-409c-b89c-96ea2d7ec1fa" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SubsequentEventMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SubsequentEventTypeDomain_3b647b51-134d-48c1-abd6-3352cb09a78f" xlink:to="loc_us-gaap_SubsequentEventMember_94346c35-eee8-409c-b89c-96ea2d7ec1fa" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StatementBusinessSegmentsAxis_0c13abb9-b828-4b71-a087-3bdcdcdd2c23" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_StatementBusinessSegmentsAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_d9afcd26-11f1-4a39-acd6-ac4905e34a54" xlink:to="loc_us-gaap_StatementBusinessSegmentsAxis_0c13abb9-b828-4b71-a087-3bdcdcdd2c23" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_0c13abb9-b828-4b71-a087-3bdcdcdd2c23_default" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_0c13abb9-b828-4b71-a087-3bdcdcdd2c23" xlink:to="loc_us-gaap_SegmentDomain_0c13abb9-b828-4b71-a087-3bdcdcdd2c23_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SegmentDomain_c5933567-c86b-4c6b-bcff-d9f59a721063" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_SegmentDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_us-gaap_StatementBusinessSegmentsAxis_0c13abb9-b828-4b71-a087-3bdcdcdd2c23" xlink:to="loc_us-gaap_SegmentDomain_c5933567-c86b-4c6b-bcff-d9f59a721063" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_FGMember_556b4648-404e-46b6-a99e-2c3a1fe67aaf" xlink:href="fnf-20231231.xsd#fnf_FGMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_SegmentDomain_c5933567-c86b-4c6b-bcff-d9f59a721063" xlink:to="loc_fnf_FGMember_556b4648-404e-46b6-a99e-2c3a1fe67aaf" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeAxis_d7b19dae-ccc0-4f8e-ab15-004b5cf52217" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_us-gaap_DebtInstrumentTable_d9afcd26-11f1-4a39-acd6-ac4905e34a54" xlink:to="loc_srt_RangeAxis_d7b19dae-ccc0-4f8e-ab15-004b5cf52217" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_d7b19dae-ccc0-4f8e-ab15-004b5cf52217_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_RangeAxis_d7b19dae-ccc0-4f8e-ab15-004b5cf52217" xlink:to="loc_srt_RangeMember_d7b19dae-ccc0-4f8e-ab15-004b5cf52217_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_RangeMember_1cccde1e-f51e-412a-8c76-0bc3890afc27" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_RangeMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_RangeAxis_d7b19dae-ccc0-4f8e-ab15-004b5cf52217" xlink:to="loc_srt_RangeMember_1cccde1e-f51e-412a-8c76-0bc3890afc27" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MaximumMember_079a4207-3597-4090-9732-44ffb5d1cec1" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MaximumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_1cccde1e-f51e-412a-8c76-0bc3890afc27" xlink:to="loc_srt_MaximumMember_079a4207-3597-4090-9732-44ffb5d1cec1" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_MinimumMember_29fd0440-371c-43c5-8c78-e2a6cdc5cc95" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_MinimumMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_RangeMember_1cccde1e-f51e-412a-8c76-0bc3890afc27" xlink:to="loc_srt_MinimumMember_29fd0440-371c-43c5-8c78-e2a6cdc5cc95" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_27715ca6-0c83-430e-9c4c-58cd895f60db" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7d81b4ba-bfd9-49ba-bc19-5e7fc6ed75c9" xlink:to="loc_us-gaap_DebtInstrumentInterestRateStatedPercentage_27715ca6-0c83-430e-9c4c-58cd895f60db" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LongTermDebt_64406a8b-c2b1-4279-b320-b4b95b27a543" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LongTermDebt"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7d81b4ba-bfd9-49ba-bc19-5e7fc6ed75c9" xlink:to="loc_us-gaap_LongTermDebt_64406a8b-c2b1-4279-b320-b4b95b27a543" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestPaidNet_3a149258-e115-46cc-aa3a-36f6295e41f4" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InterestPaidNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7d81b4ba-bfd9-49ba-bc19-5e7fc6ed75c9" xlink:to="loc_us-gaap_InterestPaidNet_3a149258-e115-46cc-aa3a-36f6295e41f4" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxesPaidNet_28382c1f-b57c-433a-ac35-2ecfeca37801" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeTaxesPaidNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7d81b4ba-bfd9-49ba-bc19-5e7fc6ed75c9" xlink:to="loc_us-gaap_IncomeTaxesPaidNet_28382c1f-b57c-433a-ac35-2ecfeca37801" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashDividendsPaidToParentCompany_27104601-f370-4961-86b9-298f38aca706" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CashDividendsPaidToParentCompany"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7d81b4ba-bfd9-49ba-bc19-5e7fc6ed75c9" xlink:to="loc_us-gaap_CashDividendsPaidToParentCompany_27104601-f370-4961-86b9-298f38aca706" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_e330d2a5-66ad-4e0e-beb9-3c366a2fd61d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7d81b4ba-bfd9-49ba-bc19-5e7fc6ed75c9" xlink:to="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_e330d2a5-66ad-4e0e-beb9-3c366a2fd61d" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_PaymentsToPurchasePreferredStockOfSubsidiary_ce76a30c-001b-499a-8c37-824f50638216" xlink:href="fnf-20231231.xsd#fnf_PaymentsToPurchasePreferredStockOfSubsidiary"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7d81b4ba-bfd9-49ba-bc19-5e7fc6ed75c9" xlink:to="loc_fnf_PaymentsToPurchasePreferredStockOfSubsidiary_ce76a30c-001b-499a-8c37-824f50638216" xlink:type="arc" order="6"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_PurchaseOfStockNumberOfSharesIssuedInTransaction_f0233047-9c7d-4bcf-9499-1abdc4aeafa1" xlink:href="fnf-20231231.xsd#fnf_PurchaseOfStockNumberOfSharesIssuedInTransaction"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7d81b4ba-bfd9-49ba-bc19-5e7fc6ed75c9" xlink:to="loc_fnf_PurchaseOfStockNumberOfSharesIssuedInTransaction_f0233047-9c7d-4bcf-9499-1abdc4aeafa1" xlink:type="arc" order="7"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockDividendRatePercentage_066cd72f-d202-4bad-bae4-8e39b7250a8b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PreferredStockDividendRatePercentage"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7d81b4ba-bfd9-49ba-bc19-5e7fc6ed75c9" xlink:to="loc_us-gaap_PreferredStockDividendRatePercentage_066cd72f-d202-4bad-bae4-8e39b7250a8b" xlink:type="arc" order="8"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockParOrStatedValuePerShare_a3b3c9d4-0d36-46a7-befa-c7cf805da6ad" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PreferredStockParOrStatedValuePerShare"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7d81b4ba-bfd9-49ba-bc19-5e7fc6ed75c9" xlink:to="loc_us-gaap_PreferredStockParOrStatedValuePerShare_a3b3c9d4-0d36-46a7-befa-c7cf805da6ad" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockLiquidationPreference_af21a35f-3af2-4d7c-9e75-4d10afc50829" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PreferredStockLiquidationPreference"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7d81b4ba-bfd9-49ba-bc19-5e7fc6ed75c9" xlink:to="loc_us-gaap_PreferredStockLiquidationPreference_af21a35f-3af2-4d7c-9e75-4d10afc50829" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockConvertibleConversionRatio_cbd56761-b4c4-482a-89d7-54c00e99cd33" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PreferredStockConvertibleConversionRatio"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_DebtInstrumentLineItems_7d81b4ba-bfd9-49ba-bc19-5e7fc6ed75c9" xlink:to="loc_us-gaap_PreferredStockConvertibleConversionRatio_cbd56761-b4c4-482a-89d7-54c00e99cd33" xlink:type="arc" order="11"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://www.fnf.com/role/ScheduleIVFGReinsuranceDetails" xlink:type="simple" xlink:href="fnf-20231231.xsd#ScheduleIVFGReinsuranceDetails"/>
  <link:definitionLink xlink:role="http://www.fnf.com/role/ScheduleIVFGReinsuranceDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_srt_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentLineItems_1551fa43-e2f2-4557-bbf9-4c7d5a654ee1" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentLineItems"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentTable_1db27c2c-8edb-4474-baf2-32180ea71d3a" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentTable"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="loc_srt_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentLineItems_1551fa43-e2f2-4557-bbf9-4c7d5a654ee1" xlink:to="loc_srt_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentTable_1db27c2c-8edb-4474-baf2-32180ea71d3a" xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductOrServiceAxis_6c3f4855-5ceb-4a24-b9c9-55c1e0182151" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductOrServiceAxis"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="loc_srt_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentTable_1db27c2c-8edb-4474-baf2-32180ea71d3a" xlink:to="loc_srt_ProductOrServiceAxis_6c3f4855-5ceb-4a24-b9c9-55c1e0182151" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_6c3f4855-5ceb-4a24-b9c9-55c1e0182151_default" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="loc_srt_ProductOrServiceAxis_6c3f4855-5ceb-4a24-b9c9-55c1e0182151" xlink:to="loc_srt_ProductsAndServicesDomain_6c3f4855-5ceb-4a24-b9c9-55c1e0182151_default" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_ProductsAndServicesDomain_1db1c0bf-b078-4a3b-943e-fa27ad98fa16" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_ProductsAndServicesDomain"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="loc_srt_ProductOrServiceAxis_6c3f4855-5ceb-4a24-b9c9-55c1e0182151" xlink:to="loc_srt_ProductsAndServicesDomain_1db1c0bf-b078-4a3b-943e-fa27ad98fa16" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_LifeInsurancePremiumsMember_1c0f66c7-8ad7-4473-9ec9-3d9955c38dc0" xlink:href="fnf-20231231.xsd#fnf_LifeInsurancePremiumsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_1db1c0bf-b078-4a3b-943e-fa27ad98fa16" xlink:to="loc_fnf_LifeInsurancePremiumsMember_1c0f66c7-8ad7-4473-9ec9-3d9955c38dc0" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_fnf_LifeContingentPRTPremiumsMember_2d7d1e12-b8bf-4157-a1ef-7683e7d248a3" xlink:href="fnf-20231231.xsd#fnf_LifeContingentPRTPremiumsMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_1db1c0bf-b078-4a3b-943e-fa27ad98fa16" xlink:to="loc_fnf_LifeContingentPRTPremiumsMember_2d7d1e12-b8bf-4157-a1ef-7683e7d248a3" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentsSegmentMember_0ecf0b01-0fba-4675-98ea-88ebe8155a14" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_InvestmentsSegmentMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ProductsAndServicesDomain_1db1c0bf-b078-4a3b-943e-fa27ad98fa16" xlink:to="loc_us-gaap_InvestmentsSegmentMember_0ecf0b01-0fba-4675-98ea-88ebe8155a14" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LifeInsuranceInForceNetAbstract_f7348715-8d4e-4988-bcad-6c3144d96dbd" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_LifeInsuranceInForceNetAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentLineItems_1551fa43-e2f2-4557-bbf9-4c7d5a654ee1" xlink:to="loc_srt_LifeInsuranceInForceNetAbstract_f7348715-8d4e-4988-bcad-6c3144d96dbd" xlink:type="arc" order="0"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LifeInsuranceInForceGross_5f2d5517-6300-4cfc-9cc0-3de1ec826780" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_LifeInsuranceInForceGross"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_LifeInsuranceInForceNetAbstract_f7348715-8d4e-4988-bcad-6c3144d96dbd" xlink:to="loc_srt_LifeInsuranceInForceGross_5f2d5517-6300-4cfc-9cc0-3de1ec826780" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LifeInsuranceInForceCeded_ba87b429-c2a8-4ef7-87a0-20e18444b36e" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_LifeInsuranceInForceCeded"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_LifeInsuranceInForceNetAbstract_f7348715-8d4e-4988-bcad-6c3144d96dbd" xlink:to="loc_srt_LifeInsuranceInForceCeded_ba87b429-c2a8-4ef7-87a0-20e18444b36e" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LifeInsuranceInForceAssumed_225f78b0-be3e-41a6-825f-f7e28f92508c" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_LifeInsuranceInForceAssumed"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_LifeInsuranceInForceNetAbstract_f7348715-8d4e-4988-bcad-6c3144d96dbd" xlink:to="loc_srt_LifeInsuranceInForceAssumed_225f78b0-be3e-41a6-825f-f7e28f92508c" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LifeInsuranceInForceNet_53aa9ba2-9c68-4847-8f42-0a6b2c74a5fb" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_LifeInsuranceInForceNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_LifeInsuranceInForceNetAbstract_f7348715-8d4e-4988-bcad-6c3144d96dbd" xlink:to="loc_srt_LifeInsuranceInForceNet_53aa9ba2-9c68-4847-8f42-0a6b2c74a5fb" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_srt_LifeInsuranceInForcePercentageAssumedToNet_2fbc7aa6-9edd-475a-bf91-716a0ab30299" xlink:href="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd#srt_LifeInsuranceInForcePercentageAssumedToNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_LifeInsuranceInForceNetAbstract_f7348715-8d4e-4988-bcad-6c3144d96dbd" xlink:to="loc_srt_LifeInsuranceInForcePercentageAssumedToNet_2fbc7aa6-9edd-475a-bf91-716a0ab30299" xlink:type="arc" order="5"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentNetAmountAbstract_8075bc35-6383-4eee-9ff6-77aa5556710d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentNetAmountAbstract"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_srt_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentLineItems_1551fa43-e2f2-4557-bbf9-4c7d5a654ee1" xlink:to="loc_us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentNetAmountAbstract_8075bc35-6383-4eee-9ff6-77aa5556710d" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DirectPremiumsEarned_c0ac803d-b31d-49f8-beeb-228aaf041e01" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_DirectPremiumsEarned"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentNetAmountAbstract_8075bc35-6383-4eee-9ff6-77aa5556710d" xlink:to="loc_us-gaap_DirectPremiumsEarned_c0ac803d-b31d-49f8-beeb-228aaf041e01" xlink:type="arc" order="1"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CededPremiumsEarned_d8af6a8f-0dbd-4bfd-a8bd-e3ebc2b3beb3" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_CededPremiumsEarned"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentNetAmountAbstract_8075bc35-6383-4eee-9ff6-77aa5556710d" xlink:to="loc_us-gaap_CededPremiumsEarned_d8af6a8f-0dbd-4bfd-a8bd-e3ebc2b3beb3" xlink:type="arc" order="2"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssumedPremiumsEarned_e0b28d25-d422-4257-9057-ff5ecc678b3b" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_AssumedPremiumsEarned"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentNetAmountAbstract_8075bc35-6383-4eee-9ff6-77aa5556710d" xlink:to="loc_us-gaap_AssumedPremiumsEarned_e0b28d25-d422-4257-9057-ff5ecc678b3b" xlink:type="arc" order="3"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PremiumsEarnedNet_62803770-7978-41d1-8c52-88d1411ca81d" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PremiumsEarnedNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentNetAmountAbstract_8075bc35-6383-4eee-9ff6-77aa5556710d" xlink:to="loc_us-gaap_PremiumsEarnedNet_62803770-7978-41d1-8c52-88d1411ca81d" xlink:type="arc" order="4"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PremiumsPercentageAssumedToNet_7304e3cc-a079-46a5-859b-c95e4108e591" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_PremiumsPercentageAssumedToNet"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_ReinsurancePremiumsForInsuranceCompaniesByProductSegmentNetAmountAbstract_8075bc35-6383-4eee-9ff6-77aa5556710d" xlink:to="loc_us-gaap_PremiumsPercentageAssumedToNet_7304e3cc-a079-46a5-859b-c95e4108e591" xlink:type="arc" order="5"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="simple" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-roles-2023.xsd#eedm"/>
  <link:definitionLink xlink:role="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeStatementAbstract" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_IncomeStatementAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnInvestments" xlink:href="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd#us-gaap_GainLossOnInvestments"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_us-gaap_IncomeStatementAbstract" xlink:to="loc_us-gaap_GainLossOnInvestments" xlink:type="arc" order="1"/>
  </link:definitionLink>
</link:linkbase>
