Source : Webster's Revised Unabridged Dictionary (1913)

Trawler \Trawl"er\, n.
   1. One who, or that which, trawls.

   2. A fishing vessel which trails a net behind it.

Source : WordNet®

trawler
     n 1: a fisherman who use a trawl net
     2: a fishing boat that uses a trawl net or dragnet to catch
        fish [syn: {dragger}]