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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:01a0b0e2-bc2d-7c7f-adb9-f544e4ecfc8c,g:38566514-d433-455c-a252-70d46973cc13-->
<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://xbrl.sec.gov/oef/role/SeriesOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2026/oef-2026.xsd#SeriesOnly"/>
  <link:definitionLink xlink:role="http://xbrl.sec.gov/oef/role/SeriesOnly" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityDomain" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityDomain"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001040674_S000109347Member_01a0b0e4-aed2-7037-90a0-ca45c08ebffd" xlink:href="ck0001040674-20260923.xsd#ck0001040674_S000109347Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_dei_EntityDomain" xlink:to="loc_ck0001040674_S000109347Member_01a0b0e4-aed2-7037-90a0-ca45c08ebffd" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://xbrl.sec.gov/oef/role/ClassOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2026/oef-2026.xsd#ClassOnly"/>
  <link:definitionLink xlink:role="http://xbrl.sec.gov/oef/role/ClassOnly" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_oef_ShareClassDomain" xlink:href="https://xbrl.sec.gov/oef/2026/oef-2026.xsd#oef_ShareClassDomain"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001040674_C000280456Member_01a0b0e6-3cc1-7c77-8b0c-c1b7dfee7932" xlink:href="ck0001040674-20260923.xsd#ck0001040674_C000280456Member"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_ShareClassDomain" xlink:to="loc_ck0001040674_C000280456Member_01a0b0e6-3cc1-7c77-8b0c-c1b7dfee7932" xlink:type="arc" order="1"/>
  </link:definitionLink>
  <link:roleRef roleURI="http://xbrl.sec.gov/rr/role/RiskOnly" xlink:type="simple" xlink:href="https://xbrl.sec.gov/oef/2026/oef-2026.xsd#RiskOnly"/>
  <link:definitionLink xlink:role="http://xbrl.sec.gov/rr/role/RiskOnly" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_oef_AllRisksMember" xlink:href="https://xbrl.sec.gov/oef/2026/oef-2026.xsd#oef_AllRisksMember"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001040674_AmericanReindustrializationRiskMember_01a0b0f2-523c-70c6-a55e-f06c447870fb" xlink:href="ck0001040674-20260923.xsd#ck0001040674_AmericanReindustrializationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001040674_AmericanReindustrializationRiskMember_01a0b0f2-523c-70c6-a55e-f06c447870fb" xlink:type="arc" order="9"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001040674_U.S.CompanySelectionRiskMember_01a0b0f2-8b26-702c-ba8a-8b362983a50d" xlink:href="ck0001040674-20260923.xsd#ck0001040674_U.S.CompanySelectionRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001040674_U.S.CompanySelectionRiskMember_01a0b0f2-8b26-702c-ba8a-8b362983a50d" xlink:type="arc" order="10"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001040674_IndustrialsSectorRiskMember_01a0b0f2-bf5e-7418-b8b4-c87057e9d93a" xlink:href="ck0001040674-20260923.xsd#ck0001040674_IndustrialsSectorRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001040674_IndustrialsSectorRiskMember_01a0b0f2-bf5e-7418-b8b4-c87057e9d93a" xlink:type="arc" order="11"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001040674_EnergySectorRiskMember_01a0b0f2-f1d1-7588-819c-e37942477d4a" xlink:href="ck0001040674-20260923.xsd#ck0001040674_EnergySectorRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001040674_EnergySectorRiskMember_01a0b0f2-f1d1-7588-819c-e37942477d4a" xlink:type="arc" order="12"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001040674_UtilitiesSectorRiskMember_01a0b0f3-3a7b-736c-a55d-e63a0904ef1f" xlink:href="ck0001040674-20260923.xsd#ck0001040674_UtilitiesSectorRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001040674_UtilitiesSectorRiskMember_01a0b0f3-3a7b-736c-a55d-e63a0904ef1f" xlink:type="arc" order="13"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001040674_InformationTechnologySectorRiskMember_01a0b0f3-7a99-7393-9517-5a588a6747e7" xlink:href="ck0001040674-20260923.xsd#ck0001040674_InformationTechnologySectorRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001040674_InformationTechnologySectorRiskMember_01a0b0f3-7a99-7393-9517-5a588a6747e7" xlink:type="arc" order="14"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001040674_MaterialsSectorRiskMember_01a0b0f3-b3c0-70ed-ba65-1e57f466f89d" xlink:href="ck0001040674-20260923.xsd#ck0001040674_MaterialsSectorRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001040674_MaterialsSectorRiskMember_01a0b0f3-b3c0-70ed-ba65-1e57f466f89d" xlink:type="arc" order="15"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001040674_RealEstateSectorRiskMember_01a0b0f3-ecf0-7f4c-a1f8-8f52da6ecc74" xlink:href="ck0001040674-20260923.xsd#ck0001040674_RealEstateSectorRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001040674_RealEstateSectorRiskMember_01a0b0f3-ecf0-7f4c-a1f8-8f52da6ecc74" xlink:type="arc" order="16"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001040674_AerospaceAndDefenseIndustryRiskMember_01a0b0f4-285d-7b9c-ae5f-dbeb1b0ba4ee" xlink:href="ck0001040674-20260923.xsd#ck0001040674_AerospaceAndDefenseIndustryRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001040674_AerospaceAndDefenseIndustryRiskMember_01a0b0f4-285d-7b9c-ae5f-dbeb1b0ba4ee" xlink:type="arc" order="17"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001040674_InfrastructureAndConstructionIndustryRiskMember_01a0b0f4-725f-7bbf-bf0f-df7ec482ef89" xlink:href="ck0001040674-20260923.xsd#ck0001040674_InfrastructureAndConstructionIndustryRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001040674_InfrastructureAndConstructionIndustryRiskMember_01a0b0f4-725f-7bbf-bf0f-df7ec482ef89" xlink:type="arc" order="18"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001040674_IndustrialMachineryAndAutomationRiskMember_01a0b0f4-bd6c-7f21-821b-eb1562cf7ae6" xlink:href="ck0001040674-20260923.xsd#ck0001040674_IndustrialMachineryAndAutomationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001040674_IndustrialMachineryAndAutomationRiskMember_01a0b0f4-bd6c-7f21-821b-eb1562cf7ae6" xlink:type="arc" order="19"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001040674_SemiconductorIndustryRiskMember_01a0b0f4-fc3a-7728-8c6a-3093c8e79e6f" xlink:href="ck0001040674-20260923.xsd#ck0001040674_SemiconductorIndustryRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001040674_SemiconductorIndustryRiskMember_01a0b0f4-fc3a-7728-8c6a-3093c8e79e6f" xlink:type="arc" order="20"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001040674_EnergyInfrastructureAndMidstreamRiskMember_01a0b0f5-4ca5-7c9d-85d3-f519e5943df7" xlink:href="ck0001040674-20260923.xsd#ck0001040674_EnergyInfrastructureAndMidstreamRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001040674_EnergyInfrastructureAndMidstreamRiskMember_01a0b0f5-4ca5-7c9d-85d3-f519e5943df7" xlink:type="arc" order="21"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001040674_MasterLimitedPartnershipMLPRiskMember_01a0b0f5-8c47-72a2-bf08-d94855bda369" xlink:href="ck0001040674-20260923.xsd#ck0001040674_MasterLimitedPartnershipMLPRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001040674_MasterLimitedPartnershipMLPRiskMember_01a0b0f5-8c47-72a2-bf08-d94855bda369" xlink:type="arc" order="22"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001040674_REITRiskMember_01a0b0f5-c340-7b08-a99a-cff86811d70b" xlink:href="ck0001040674-20260923.xsd#ck0001040674_REITRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001040674_REITRiskMember_01a0b0f5-c340-7b08-a99a-cff86811d70b" xlink:type="arc" order="23"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001040674_DividendPayingSecuritiesRiskMember_01a0b0f5-f852-7aa9-88f5-69bde7ab4c62" xlink:href="ck0001040674-20260923.xsd#ck0001040674_DividendPayingSecuritiesRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001040674_DividendPayingSecuritiesRiskMember_01a0b0f5-f852-7aa9-88f5-69bde7ab4c62" xlink:type="arc" order="24"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001040674_DividendGrowthRiskMember_01a0b0f6-4305-7c29-a510-20884e24e435" xlink:href="ck0001040674-20260923.xsd#ck0001040674_DividendGrowthRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001040674_DividendGrowthRiskMember_01a0b0f6-4305-7c29-a510-20884e24e435" xlink:type="arc" order="25"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001040674_EquitySecuritiesRiskMember_01a0b0f6-8028-725b-bdfd-203a14832f74" xlink:href="ck0001040674-20260923.xsd#ck0001040674_EquitySecuritiesRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001040674_EquitySecuritiesRiskMember_01a0b0f6-8028-725b-bdfd-203a14832f74" xlink:type="arc" order="26"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001040674_MarketRiskMember_01a0b0f6-bce4-77f3-89f2-d6a4f6fc6ba0" xlink:href="ck0001040674-20260923.xsd#ck0001040674_MarketRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001040674_MarketRiskMember_01a0b0f6-bce4-77f3-89f2-d6a4f6fc6ba0" xlink:type="arc" order="27"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001040674_InvestmentRiskMember_01a0b0f6-f7a4-71f9-a2da-fb525d5ead1d" xlink:href="ck0001040674-20260923.xsd#ck0001040674_InvestmentRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001040674_InvestmentRiskMember_01a0b0f6-f7a4-71f9-a2da-fb525d5ead1d" xlink:type="arc" order="28"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001040674_PassiveInvestmentRiskMember_01a0b0f7-2ecf-7767-848d-a253e9a86650" xlink:href="ck0001040674-20260923.xsd#ck0001040674_PassiveInvestmentRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001040674_PassiveInvestmentRiskMember_01a0b0f7-2ecf-7767-848d-a253e9a86650" xlink:type="arc" order="29"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001040674_IndexMethodologyRiskMember_01a0b0f7-695a-7c8b-80dd-5256cabd2e99" xlink:href="ck0001040674-20260923.xsd#ck0001040674_IndexMethodologyRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001040674_IndexMethodologyRiskMember_01a0b0f7-695a-7c8b-80dd-5256cabd2e99" xlink:type="arc" order="30"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001040674_TrackingErrorRiskMember_01a0b0f7-a3ce-73bd-a143-90433ec46575" xlink:href="ck0001040674-20260923.xsd#ck0001040674_TrackingErrorRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001040674_TrackingErrorRiskMember_01a0b0f7-a3ce-73bd-a143-90433ec46575" xlink:type="arc" order="31"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001040674_ConcentrationRiskMember_01a0b0f8-0dd5-7413-bcde-c0528973f676" xlink:href="ck0001040674-20260923.xsd#ck0001040674_ConcentrationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001040674_ConcentrationRiskMember_01a0b0f8-0dd5-7413-bcde-c0528973f676" xlink:type="arc" order="32"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001040674_ETFRisksMember_01a0b0f8-4b03-758d-97d6-dad05392274e" xlink:href="ck0001040674-20260923.xsd#ck0001040674_ETFRisksMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001040674_ETFRisksMember_01a0b0f8-4b03-758d-97d6-dad05392274e" xlink:type="arc" order="33"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001040674_ETFRisksAuthorizedParticipantsMarketMakersAndLiquidityProvidersLimitationRiskMember_01a0b0f8-a5ed-7ad8-b7b0-76b8f1d9f979" xlink:href="ck0001040674-20260923.xsd#ck0001040674_ETFRisksAuthorizedParticipantsMarketMakersAndLiquidityProvidersLimitationRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001040674_ETFRisksAuthorizedParticipantsMarketMakersAndLiquidityProvidersLimitationRiskMember_01a0b0f8-a5ed-7ad8-b7b0-76b8f1d9f979" xlink:type="arc" order="34"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001040674_ETFRisksCashRedemptionRiskMember_01a0b0f9-0c7b-7e3a-b9b0-23f8b2b50dd8" xlink:href="ck0001040674-20260923.xsd#ck0001040674_ETFRisksCashRedemptionRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001040674_ETFRisksCashRedemptionRiskMember_01a0b0f9-0c7b-7e3a-b9b0-23f8b2b50dd8" xlink:type="arc" order="35"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001040674_ETFRisksCostsOfBuyingOrSellingSharesRiskMember_01a0b0f9-630c-7be6-8176-49d586454ab2" xlink:href="ck0001040674-20260923.xsd#ck0001040674_ETFRisksCostsOfBuyingOrSellingSharesRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001040674_ETFRisksCostsOfBuyingOrSellingSharesRiskMember_01a0b0f9-630c-7be6-8176-49d586454ab2" xlink:type="arc" order="36"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001040674_ETFRisksSharesMayTradeAtPricesOtherThanNAVRiskMember_01a0b0f9-b538-7852-ab07-e612e0e4f39b" xlink:href="ck0001040674-20260923.xsd#ck0001040674_ETFRisksSharesMayTradeAtPricesOtherThanNAVRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001040674_ETFRisksSharesMayTradeAtPricesOtherThanNAVRiskMember_01a0b0f9-b538-7852-ab07-e612e0e4f39b" xlink:type="arc" order="37"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001040674_ETFRisksTradingRiskMember_01a0b0f9-f2dc-75e1-8ba3-dcddf9b15135" xlink:href="ck0001040674-20260923.xsd#ck0001040674_ETFRisksTradingRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001040674_ETFRisksTradingRiskMember_01a0b0f9-f2dc-75e1-8ba3-dcddf9b15135" xlink:type="arc" order="38"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001040674_CashTransactionsRiskMember_01a0b0fa-2f53-71ae-bd90-b679cd04721e" xlink:href="ck0001040674-20260923.xsd#ck0001040674_CashTransactionsRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001040674_CashTransactionsRiskMember_01a0b0fa-2f53-71ae-bd90-b679cd04721e" xlink:type="arc" order="39"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001040674_CyberSecurityRiskMember_01a0b0fa-6587-7ea1-810f-0367e396bdf7" xlink:href="ck0001040674-20260923.xsd#ck0001040674_CyberSecurityRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001040674_CyberSecurityRiskMember_01a0b0fa-6587-7ea1-810f-0367e396bdf7" xlink:type="arc" order="40"/>
    <link:loc xlink:type="locator" xlink:label="loc_ck0001040674_NewFundRiskMember_01a0b0fa-d5ce-78b3-8cca-8ee722bd7a68" xlink:href="ck0001040674-20260923.xsd#ck0001040674_NewFundRiskMember"/>
    <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_oef_AllRisksMember" xlink:to="loc_ck0001040674_NewFundRiskMember_01a0b0fa-d5ce-78b3-8cca-8ee722bd7a68" xlink:type="arc" order="41"/>
  </link:definitionLink>
</link:linkbase>
