One of a pair of movable appendages used for flying, as the feather-covered modified forelimb of a bird or the skin-covered modified forelimb of a bat or pterosaur, A structure or part used by an animal for gliding through the air, as the folds of skin of a flying squirrel or the enlarged pectoral fins of a flying fish, Something that resembles a wing in appearance or function, especially, intransitive verb_ To furnish with side or subordinate extensions, as a building or an altarpiec, To strike or wound in a wing or an appendage, To say or do (something) without preparation or forethought; improvise