From WordNet (r) 3.0 (2006) [wn]:
fisherman
n 1: someone whose occupation is catching fish [syn:
fisherman, fisher]
From The Collaborative International Dictionary of English v.0.48 [gcide]: Fisherman \Fish"er*man\, n.; pl. Fishermen. 1. One whose occupation is to catch fish. [1913 Webster] 2. (Naut.) A ship or vessel employed in the business of taking fish, as in the cod fishery. [1913 Webster]