DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   blot out
       v 1: make undecipherable or imperceptible by obscuring or
            concealing; "a hidden message"; "a veiled threat" [syn:
            obscure, blot out, obliterate, veil, hide]