WordWeb Online

1. (of an arrow) not equipped with feathers
   "shot an unfledged arrow";
   - fledgeless, unvaned
    
2. Young and inexperienced
   "an unfledged lawyer";
   - fledgling, callow
    
3. (of birds) not yet having developed feathers
   "a small unfledged sparrow on the window sill";
   - immature

See also: featherless, green [informal], inexperienced, inexperient [non-standard], unfeathered, wet behind the ears