Source : Webster's Revised Unabridged Dictionary (1913)

Navigator \Nav"i*ga`tor\, n.
   One who navigates or sails; esp., one who direct the course
   of a ship, or one who is skillful in the art of navigation;
   also, a book which teaches the art of navigation; as,
   Bowditch's Navigator.

Source : WordNet®

navigator
     n 1: the ship's officer in charge of navigation [syn: {sailing
          master}]
     2: the member of an aircrew who is responsible for the
        aircraft's course
     3: in earlier times, a person who explored by ship

Source : Free On-Line Dictionary of Computing

Navigator
     
        {Netscape Navigator}