Source : Webster's Revised Unabridged Dictionary (1913)

Flyaway \Fly"a*way`\, a.
   Disposed to fly away; flighty; unrestrained; light and free;
   -- used of both persons and things. -- n. A flyaway person or
   thing. ``Truth is such a flyaway.'' --Emerson.

Source : WordNet®

flyaway
     adj 1: irresponsibly frivolous; "flighty young girls" [syn: {flighty}]
     2: (of hair or clothing) worn loose; "her flyaway hair"; "a
        flyaway coat"