<?xml version="1.0" encoding="US-ASCII" standalone="no"?>
    <!-- Field: Doc-Info; Name: Generator; Value: GoFiler Complete; Version: 6.6a -->
    <!-- Field: Doc-Info; Name: VendorURI; Value: https://www.novaworks.com -->
    <!-- Field: Doc-Info; Name: Status; Value: 0x00000000 -->
<link:linkbase xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xbrli="http://www.xbrl.org/2003/instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
    <link:roleRef xlink:type="simple" xlink:href="adt-20261008.xsd#Cover" roleURI="http://AAMlive.com/role/Cover" />
    <link:roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/fnd/2026q3/fnd-2026q3.xsd#PortfolioOnly" roleURI="http://xbrl.sec.gov/uit/role/PortfolioOnly" />
    <link:arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension" arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" />
    <link:arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain" arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" />
    <link:arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member" arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" />
    <link:arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all" arcroleURI="http://xbrl.org/int/dim/arcrole/all" />
    <link:arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#notAll" arcroleURI="http://xbrl.org/int/dim/arcrole/notAll" />
    <link:arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default" arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" />
    <link:definitionLink xlink:type="extended" xlink:role="http://AAMlive.com/role/Cover" xlink:title="00000001 - Document - Cover" />
    <link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/uit/role/PortfolioOnly">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/fnd/2026q3/fnd-2026q3.xsd#fnd_AllPortfoliosMember" xlink:label="loc_fndAllPortfoliosMember" />
      <link:loc xlink:type="locator" xlink:href="adt-20261008.xsd#adt_CohenandSteersCaliforniaMunicipalClosedEndPortfolioSeries20263Member" xlink:label="loc_adtCohenandSteersCaliforniaMunicipalClosedEndPortfolioSeries20263Member" />
      <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fndAllPortfoliosMember" xlink:to="loc_adtCohenandSteersCaliforniaMunicipalClosedEndPortfolioSeries20263Member" xlink:type="arc" order="0" />
      <link:loc xlink:type="locator" xlink:href="adt-20261008.xsd#adt_CohenandSteersMunicipalClosedEndPortfolioSeries20262Member" xlink:label="loc_adtCohenandSteersMunicipalClosedEndPortfolioSeries20262Member" />
      <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fndAllPortfoliosMember" xlink:to="loc_adtCohenandSteersMunicipalClosedEndPortfolioSeries20262Member" xlink:type="arc" order="10" />
      <link:loc xlink:type="locator" xlink:href="adt-20261008.xsd#adt_DividendStrengthPortfolioSeries20264Member" xlink:label="loc_adtDividendStrengthPortfolioSeries20264Member" />
      <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fndAllPortfoliosMember" xlink:to="loc_adtDividendStrengthPortfolioSeries20264Member" xlink:type="arc" order="20" />
      <link:loc xlink:type="locator" xlink:href="adt-20261008.xsd#adt_EnergyOpportunitiesPortfolioSeries20262Member" xlink:label="loc_adtEnergyOpportunitiesPortfolioSeries20262Member" />
      <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fndAllPortfoliosMember" xlink:to="loc_adtEnergyOpportunitiesPortfolioSeries20262Member" xlink:type="arc" order="30" />
      <link:loc xlink:type="locator" xlink:href="adt-20261008.xsd#adt_HighDividendESGPortfolioSeries20262Member" xlink:label="loc_adtHighDividendESGPortfolioSeries20262Member" />
      <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fndAllPortfoliosMember" xlink:to="loc_adtHighDividendESGPortfolioSeries20262Member" xlink:type="arc" order="40" />
      <link:loc xlink:type="locator" xlink:href="adt-20261008.xsd#adt_StrategicFoundationsofGrowthPortfolioSeries20262Member" xlink:label="loc_adtStrategicFoundationsofGrowthPortfolioSeries20262Member" />
      <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fndAllPortfoliosMember" xlink:to="loc_adtStrategicFoundationsofGrowthPortfolioSeries20262Member" xlink:type="arc" order="50" />
      <link:loc xlink:type="locator" xlink:href="adt-20261008.xsd#adt_ToddInternationalIntrinsicValuePortfolioSeries20262Member" xlink:label="loc_adtToddInternationalIntrinsicValuePortfolioSeries20262Member" />
      <link:definitionArc xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="loc_fndAllPortfoliosMember" xlink:to="loc_adtToddInternationalIntrinsicValuePortfolioSeries20262Member" xlink:type="arc" order="60" />
    </link:definitionLink>
</link:linkbase>
