transitive. Of a bird, esp. a hawk: to moult or shed (its feathers). Formerly also in passive, with the bird as subject. Frequently figurative. Obs…
transitive. Of birds: To cast (their feathers); to moult. Obsolete.
transitive. Of a bird: to shed (feathers) in the process of changing plumage. Formerly also with †away, †off.
transitive. = moult, v. 3. Obsolete. rare.
transitive. Of an animal: to shed or moult (an outer layer of skin, a covering of feathers, etc.). Obsolete.