WordNet (r) 3.0 (2006):

Superfund
    n 1: the federal government's program to locate and investigate
         and clean up the worst uncontrolled and abandoned toxic
         waste sites nationwide; administered by the Environmental
         Protection Agency; "some have intimated that the
         Superfund's money may have turned into a political slush
         fund" [syn: Superfund program, Superfund]