DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   black out
       v 1: obliterate or extinguish; "Some life-forms were obliterated
            by the radiation, others survived"
       2: darken completely; "The dining room blackened out" [syn:
          black out, blacken out]
       3: suppress by censorship as for political reasons; "parts of
          the newspaper article were blacked out"
       4: lose consciousness due to a sudden trauma, for example [syn:
          zonk out, pass out, black out]