Source : Webster's Revised Unabridged Dictionary (1913)

Aeronaut \A"["e]r*o*naut\ (?; 277), n. [F. a['e]ronaute, fr. Gr.
   ? air + ? sailor. See {Nautical}.]
   An a["e]rial navigator; a balloonist.

Source : WordNet®

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