DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   harrier
       n 1: a persistent attacker; "the harassers were not members of
            the regular army" [syn: harasser, harrier]
       2: a hound that resembles a foxhound but is smaller; used to
          hunt rabbits
       3: hawks that hunt over meadows and marshes and prey on small
          terrestrial animals