1. (of hair or clothing) worn loose
   "her flyaway hair"; "a flyaway coat"
    
2. Guided by whim and fancy
   "flyaway young girls";
   - flighty, head-in-the-clouds [informal], scatterbrained, dippy [informal]

See also: ditsy [N. Amer, informal], ditzy [N. Amer, informal], frivolous, loose

Encyclopedia: Flyaway