<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<link:linkbase xmlns:ns6="http://www.sec.gov/edgar/common" xmlns:ns5="http://www.sec.gov/edgar/singlefilersc" xmlns:ns8="http://www.sec.gov/edgar/coregsc" xmlns:ns7="http://www.sec.gov/edgar/sccommon" xmlns:ns9="http://www.sec.gov/edgar/bulkfiling" xmlns:ns11="http://xbrl.org/2006/xbrldi" xmlns:ns10="http://www.sec.gov/edgar/feecommon" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:ns4="http://www.xbrl.org/2003/instance" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:ns3="http://www.xbrl.org/2003/XLink">
    <link:roleRef roleURI="http://xbrl.sec.gov/oef/role/SeriesOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#SeriesOnly"/>
    <link:roleRef roleURI="http://xbrl.sec.gov/oef/role/ClassOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#ClassOnly"/>
    <link:roleRef roleURI="http://xbrl.sec.gov/rr/role/RiskOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#RiskOnly"/>
    <link:roleRef roleURI="http://xbrl.sec.gov/rr/role/PerformanceMeasureOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#PerformanceMeasureOnly"/>
    <link:roleRef roleURI="http://www.fidelity.com/role/DocumentInformation" xlink:type="simple" xlink:href="fmr-20261101.xsd#role_DocumentInformation"/>
    <link:roleRef roleURI="http://www.fidelity.com/role/RiskSummaryS000017660_VIPInvestorFreedomFunds-InvestorComboPRO" xlink:type="simple" xlink:href="fmr-20261101.xsd#role_RiskSummaryS000017660_VIPInvestorFreedomFunds-InvestorComboPRO"/>
    <link:roleRef roleURI="http://www.fidelity.com/role/DisclosureDetailS000017660_VIPInvestorFreedomFunds-InvestorComboPRO" xlink:type="simple" xlink:href="fmr-20261101.xsd#role_DisclosureDetailS000017660_VIPInvestorFreedomFunds-InvestorComboPRO"/>
    <link:roleRef roleURI="http://www.fidelity.com/role/RiskSummaryS000017661_VIPInvestorFreedomFunds-InvestorComboPRO" xlink:type="simple" xlink:href="fmr-20261101.xsd#role_RiskSummaryS000017661_VIPInvestorFreedomFunds-InvestorComboPRO"/>
    <link:roleRef roleURI="http://www.fidelity.com/role/DisclosureDetailS000017661_VIPInvestorFreedomFunds-InvestorComboPRO" xlink:type="simple" xlink:href="fmr-20261101.xsd#role_DisclosureDetailS000017661_VIPInvestorFreedomFunds-InvestorComboPRO"/>
    <link:roleRef roleURI="http://www.fidelity.com/role/RiskSummaryS000017662_VIPInvestorFreedomFunds-InvestorComboPRO" xlink:type="simple" xlink:href="fmr-20261101.xsd#role_RiskSummaryS000017662_VIPInvestorFreedomFunds-InvestorComboPRO"/>
    <link:roleRef roleURI="http://www.fidelity.com/role/DisclosureDetailS000017662_VIPInvestorFreedomFunds-InvestorComboPRO" xlink:type="simple" xlink:href="fmr-20261101.xsd#role_DisclosureDetailS000017662_VIPInvestorFreedomFunds-InvestorComboPRO"/>
    <link:roleRef roleURI="http://www.fidelity.com/role/RiskSummaryS000017663_VIPInvestorFreedomFunds-InvestorComboPRO" xlink:type="simple" xlink:href="fmr-20261101.xsd#role_RiskSummaryS000017663_VIPInvestorFreedomFunds-InvestorComboPRO"/>
    <link:roleRef roleURI="http://www.fidelity.com/role/DisclosureDetailS000017663_VIPInvestorFreedomFunds-InvestorComboPRO" xlink:type="simple" xlink:href="fmr-20261101.xsd#role_DisclosureDetailS000017663_VIPInvestorFreedomFunds-InvestorComboPRO"/>
    <link:roleRef roleURI="http://www.fidelity.com/role/RiskSummaryS000017664_VIPInvestorFreedomFunds-InvestorComboPRO" xlink:type="simple" xlink:href="fmr-20261101.xsd#role_RiskSummaryS000017664_VIPInvestorFreedomFunds-InvestorComboPRO"/>
    <link:roleRef roleURI="http://www.fidelity.com/role/DisclosureDetailS000017664_VIPInvestorFreedomFunds-InvestorComboPRO" xlink:type="simple" xlink:href="fmr-20261101.xsd#role_DisclosureDetailS000017664_VIPInvestorFreedomFunds-InvestorComboPRO"/>
    <link:roleRef roleURI="http://www.fidelity.com/role/RiskSummaryS000076747_VIPInvestorFreedomFunds-InvestorComboPRO" xlink:type="simple" xlink:href="fmr-20261101.xsd#role_RiskSummaryS000076747_VIPInvestorFreedomFunds-InvestorComboPRO"/>
    <link:roleRef roleURI="http://www.fidelity.com/role/DisclosureDetailS000076747_VIPInvestorFreedomFunds-InvestorComboPRO" xlink:type="simple" xlink:href="fmr-20261101.xsd#role_DisclosureDetailS000076747_VIPInvestorFreedomFunds-InvestorComboPRO"/>
    <link:roleRef roleURI="http://www.fidelity.com/role/RiskSummaryS000076748_VIPInvestorFreedomFunds-InvestorComboPRO" xlink:type="simple" xlink:href="fmr-20261101.xsd#role_RiskSummaryS000076748_VIPInvestorFreedomFunds-InvestorComboPRO"/>
    <link:roleRef roleURI="http://www.fidelity.com/role/DisclosureDetailS000076748_VIPInvestorFreedomFunds-InvestorComboPRO" xlink:type="simple" xlink:href="fmr-20261101.xsd#role_DisclosureDetailS000076748_VIPInvestorFreedomFunds-InvestorComboPRO"/>
    <link:roleRef roleURI="http://www.fidelity.com/role/RiskSummaryS000076749_VIPInvestorFreedomFunds-InvestorComboPRO" xlink:type="simple" xlink:href="fmr-20261101.xsd#role_RiskSummaryS000076749_VIPInvestorFreedomFunds-InvestorComboPRO"/>
    <link:roleRef roleURI="http://www.fidelity.com/role/DisclosureDetailS000076749_VIPInvestorFreedomFunds-InvestorComboPRO" xlink:type="simple" xlink:href="fmr-20261101.xsd#role_DisclosureDetailS000076749_VIPInvestorFreedomFunds-InvestorComboPRO"/>
    <link:roleRef roleURI="http://www.fidelity.com/role/RiskSummaryS000076750_VIPInvestorFreedomFunds-InvestorComboPRO" xlink:type="simple" xlink:href="fmr-20261101.xsd#role_RiskSummaryS000076750_VIPInvestorFreedomFunds-InvestorComboPRO"/>
    <link:roleRef roleURI="http://www.fidelity.com/role/DisclosureDetailS000076750_VIPInvestorFreedomFunds-InvestorComboPRO" xlink:type="simple" xlink:href="fmr-20261101.xsd#role_DisclosureDetailS000076750_VIPInvestorFreedomFunds-InvestorComboPRO"/>
    <link:roleRef roleURI="http://www.fidelity.com/role/RiskSummaryS000017665_VIPInvestorFreedomFunds-InvestorComboPRO" xlink:type="simple" xlink:href="fmr-20261101.xsd#role_RiskSummaryS000017665_VIPInvestorFreedomFunds-InvestorComboPRO"/>
    <link:roleRef roleURI="http://www.fidelity.com/role/DisclosureDetailS000017665_VIPInvestorFreedomFunds-InvestorComboPRO" xlink:type="simple" xlink:href="fmr-20261101.xsd#role_DisclosureDetailS000017665_VIPInvestorFreedomFunds-InvestorComboPRO"/>
    <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-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/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/domain-member" xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member"/>
    <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:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/SeriesOnly" xlink:title="050020 - Document - Series">
        <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LegalEntityAxis" xlink:label="LegalEntityAxis"/>
        <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityDomain" xlink:label="EntityDomain"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_S000017665Member" xlink:label="fmr_S000017665Member"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="fmr_S000017665Member" order="10.1"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_S000017660Member" xlink:label="fmr_S000017660Member"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="fmr_S000017660Member" order="10.2"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_S000017661Member" xlink:label="fmr_S000017661Member"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="fmr_S000017661Member" order="10.3"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_S000017662Member" xlink:label="fmr_S000017662Member"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="fmr_S000017662Member" order="10.4"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_S000017663Member" xlink:label="fmr_S000017663Member"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="fmr_S000017663Member" order="10.5"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_S000017664Member" xlink:label="fmr_S000017664Member"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="fmr_S000017664Member" order="10.6"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_S000076747Member" xlink:label="fmr_S000076747Member"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="fmr_S000076747Member" order="10.7"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_S000076748Member" xlink:label="fmr_S000076748Member"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="fmr_S000076748Member" order="10.8"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_S000076749Member" xlink:label="fmr_S000076749Member"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="fmr_S000076749Member" order="10.9"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_S000076750Member" xlink:label="fmr_S000076750Member"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="EntityDomain" xlink:to="fmr_S000076750Member" order="11.0"/>
    </link:definitionLink>
    <link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/oef/role/ClassOnly" xlink:title="050030 - Document - Class">
        <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_ShareClassDomain" xlink:label="ShareClassDomain"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_C000048808Member" xlink:label="fmr_C000048808Member"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_C000048803Member" xlink:label="fmr_C000048803Member"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_C000048804Member" xlink:label="fmr_C000048804Member"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_C000048805Member" xlink:label="fmr_C000048805Member"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_C000048806Member" xlink:label="fmr_C000048806Member"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_C000048807Member" xlink:label="fmr_C000048807Member"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_C000236782Member" xlink:label="fmr_C000236782Member"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_C000236783Member" xlink:label="fmr_C000236783Member"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_C000236784Member" xlink:label="fmr_C000236784Member"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_C000236785Member" xlink:label="fmr_C000236785Member"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="fmr_C000048808Member" order="2"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="fmr_C000048803Member" order="3"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="fmr_C000048804Member" order="4"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="fmr_C000048805Member" order="5"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="fmr_C000048806Member" order="6"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="fmr_C000048807Member" order="7"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="fmr_C000236782Member" order="8"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="fmr_C000236783Member" order="9"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="fmr_C000236784Member" order="10"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ShareClassDomain" xlink:to="fmr_C000236785Member" order="11"/>
    </link:definitionLink>
    <link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rr/role/RiskOnly" xlink:title="050010 - Document - Risk">
        <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AllRisksMember" xlink:label="AllRisksMember"/>
        <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_RiskAxis" xlink:label="RiskAxis"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_LeverageRiskMember" xlink:label="LeverageRiskMember"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="LeverageRiskMember" order="500"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_GrowthInvestingMember" xlink:label="GrowthInvestingMember"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="GrowthInvestingMember" order="500.1"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_InvestingInOtherFundsMember" xlink:label="InvestingInOtherFundsMember"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="InvestingInOtherFundsMember" order="500.2"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_IndustryExposureMember" xlink:label="IndustryExposureMember"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="IndustryExposureMember" order="500.3"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_AssetAllocationRiskMember" xlink:label="AssetAllocationRiskMember"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="AssetAllocationRiskMember" order="500.4"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_IssuerSpecificChangesMember" xlink:label="IssuerSpecificChangesMember"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="IssuerSpecificChangesMember" order="500.5"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_StockMarketVolatilityMember" xlink:label="StockMarketVolatilityMember"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="StockMarketVolatilityMember" order="500.6"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_CommodityFuturesMember" xlink:label="CommodityFuturesMember"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="CommodityFuturesMember" order="500.7"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_CorrelationToIndexMember" xlink:label="CorrelationToIndexMember"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="CorrelationToIndexMember" order="500.8"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_InterestRateChangesMember" xlink:label="InterestRateChangesMember"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="InterestRateChangesMember" order="500.9"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_SecuritizedDebtSecuritiesExposureMember" xlink:label="SecuritizedDebtSecuritiesExposureMember"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="SecuritizedDebtSecuritiesExposureMember" order="501.0"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_USTreasuryObligationsMember" xlink:label="USTreasuryObligationsMember"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="USTreasuryObligationsMember" order="501.1"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_ValueInvestingMember" xlink:label="ValueInvestingMember"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="ValueInvestingMember" order="501.2"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_SecuritiesLendingRiskMember" xlink:label="SecuritiesLendingRiskMember"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="SecuritiesLendingRiskMember" order="501.3"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_CommodityLinkedInvestingMember" xlink:label="CommodityLinkedInvestingMember"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="CommodityLinkedInvestingMember" order="501.4"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_ForeignExposureMember" xlink:label="ForeignExposureMember"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="ForeignExposureMember" order="501.5"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_PassiveManagementRiskMember" xlink:label="PassiveManagementRiskMember"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="PassiveManagementRiskMember" order="501.6"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_PrepaymentMember" xlink:label="PrepaymentMember"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="PrepaymentMember" order="501.7"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_MidCapInvestingMember" xlink:label="MidCapInvestingMember"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="MidCapInvestingMember" order="501.8"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_InflationProtectedDebtExposureMember" xlink:label="InflationProtectedDebtExposureMember"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="AllRisksMember" xlink:to="InflationProtectedDebtExposureMember" order="501.9"/>
    </link:definitionLink>
    <link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/rr/role/PerformanceMeasureOnly" xlink:title="050040 - Document - Performance Measure">
        <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_PerformanceMeasureDomain" xlink:label="PerformanceMeasureDomain"/>
        <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AfterTaxesOnDistributionsMember" xlink:label="AfterTaxesOnDistributionsMember"/>
        <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/oef/2025/oef-2025.xsd#oef_AfterTaxesOnDistributionsAndSalesMember" xlink:label="AfterTaxesOnDistributionsAndSalesMember"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_IndexIXRNHMember" xlink:label="fmr_IndexIXRNHMember"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_IndexLB001Member" xlink:label="fmr_IndexLB001Member"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_IndexIXRNJMember" xlink:label="fmr_IndexIXRNJMember"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_IndexIXRNLMember" xlink:label="fmr_IndexIXRNLMember"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_IndexIXRNMMember" xlink:label="fmr_IndexIXRNMMember"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_IndexIXRNNMember" xlink:label="fmr_IndexIXRNNMember"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_IndexSP001Member" xlink:label="fmr_IndexSP001Member"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_IndexIXRNOMember" xlink:label="fmr_IndexIXRNOMember"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_IndexIXRNPMember" xlink:label="fmr_IndexIXRNPMember"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_IndexIXRNQMember" xlink:label="fmr_IndexIXRNQMember"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_IndexIXRNRMember" xlink:label="fmr_IndexIXRNRMember"/>
        <link:loc xlink:type="locator" xlink:href="fmr-20261101.xsd#fmr_IndexIXRNSMember" xlink:label="fmr_IndexIXRNSMember"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="fmr_IndexIXRNHMember" order="5"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="fmr_IndexLB001Member" order="6"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="fmr_IndexIXRNJMember" order="7"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="fmr_IndexIXRNLMember" order="8"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="fmr_IndexIXRNMMember" order="9"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="fmr_IndexIXRNNMember" order="10"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="fmr_IndexSP001Member" order="11"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="fmr_IndexIXRNOMember" order="12"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="fmr_IndexIXRNPMember" order="13"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="fmr_IndexIXRNQMember" order="14"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="fmr_IndexIXRNRMember" order="15"/>
        <link:definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="PerformanceMeasureDomain" xlink:to="fmr_IndexIXRNSMember" order="16"/>
    </link:definitionLink>
</link:linkbase>
