DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   DIA
       n 1: an intelligence agency of the United States in the
            Department of Defense; is responsible for providing
            intelligence in support of military planning and operations
            and weapons acquisition [syn: Defense Intelligence
    Agency, DIA]