Source : Webster's Revised Unabridged Dictionary (1913)

Marksman \Marks"man\, n.; pl. {Marksmen}. [Earlier markman; mark
   + man.]
   1. One skillful to hit a mark with a missile; one who shoots
      well.

Source : WordNet®

marksman
     n : someone skilled in shooting [syn: {sharpshooter}, {crack
         shot}]