fully-fledged
/ˌfʊlɪˈfledʒd/adjective
1- Brit. completely developed or established; of full status〈英〉充分开展的, 全面确立的; 完全有资格的：
David had become a fully-fledged pilot.
大卫已经成为一名完全合格的飞行员。
1.1
- (of a bird) having grown all its feathers and able to fly（鸟）羽翼丰满的。