Origin: 1350–1400; Middle English flegge (fully-)fledged, Old English *flecge, as variant of -flycge; cognate with Old High German flucki,Middle Low German vlügge (> German flügge); akin to fly1
O.E. flycge (Kentish fligge), from W.Gmc. *fluggja- (cf. M.Du. vlugge, Low Ger. flügge). Originally an adj. meaning "having the feathers, fit to fly." As a verb, it is first attested in English 1560s. Related: Fledged; fledging.