Source : Webster's Revised Unabridged Dictionary (1913)

Stealer \Steal"er\, n.
   1. One who steals; a thief.

   2. (Shipbuilding) The endmost plank of a strake which stops
      short of the stem or stern.

Source : WordNet®

stealer
     n : a criminal who takes property belonging to someone else with
         the intention of keeping it or selling it [syn: {thief}]