The Collaborative International Dictionary of English v.0.48:

Aviator \A"vi*a`tor\, n.
   1. An experimenter in aviation.
      [1913 Webster]

   2. A flying machine. [archaic]
      [1913 Webster]

   3. The driver or pilot of an aircraft, especially of an
      airplane.
      [Webster 1913 Suppl.] Aviatress

WordNet (r) 3.0 (2006):

aviator
    n 1: someone who operates an aircraft [syn: aviator,
         aeronaut, airman, flier, flyer]