subordinated bond
noun[C]
FINANCE(alsosubordinate bond)ukus(alsosubordinated debenture)abondthat will bepaidback after otherbonds, if theissuer(=companyorgovernmentofferingit forsale)gets intofinancialdifficulty:
Banksregularlyissueundatedsubordinatedbondstoboosttheircapitalbase.