Source : Webster's Revised Unabridged Dictionary (1913)

Unfledged \Un*fledged"\, a.
   Not fledged; not feathered; hence, not fully developed;
   immature. --Dryden.

Source : WordNet®

unfledged
     adj 1: (of birds) not yet having developed feathers; "a small
            unfledged sparrow on the window sill" [syn: {immature}]
            [ant: {fledged}]
     2: (of an arrow) not equipped with feathers; "shot an unfledged
        arrow" [syn: {fledgeless}, {unvaned}]
     3: young and inexperienced; "a fledgling enterprise"; "a
        fledgling skier"; "an unfledged lawyer" [syn: {fledgling}]