Source : Webster's Revised Unabridged Dictionary (1913)

Bowler \Bowl"er\, n. [From 2d {Bowl}.]
   A derby hat. [Eng.]

Bowler \Bowl"er\, n.
   One who plays at bowls, or who rolls the ball in cricket or
   any other game.

Source : WordNet®

bowler
     n 1: delivers the ball to the batsman in cricket
     2: rolls balls down an alley at pins
     3: a hat that is round and black and hard with a narrow brim;
        worn by some British businessmen [syn: {bowler hat}, {derby},
         {plug hat}]