Source : Webster's Revised Unabridged Dictionary (1913)

Barnstormer \Barn"storm`er\, n. [Barn + storm, v.]
   An itinerant theatrical player who plays in barns when a
   theatre is lacking; hence, an inferior actor, or one who
   plays in the country away from the larger cities. --
   {Barn"storm`ing}, n. [Theatrical Cant]

Source : WordNet®

barnstormer
     n 1: an actor who travels around the country presenting plays
          [syn: {playactor}, {play-actor}, {trouper}]
     2: a pilot who travels around the country giving exhibits of
        stunt flying and parachuting [syn: {stunt flier}, {stunt
        pilot}]