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a. A male peafowl, distinguished by its crested head, brilliant blue or green plumage, and long modified back feathers that are marked with iridescent eyelike spots and that can be spread in a fanlike form.
b. A peafowl, either male or female.
2. A vain or ostentatious person.
intr.v. pea·cocked, pea·cock·ing, pea·cocks
To strut about like a peacock; exhibit oneself vainly.
[Middle English pocock, pecok : po, peacock (from Old English pawa, pēa, peafowl, from Latin pāvō, peacock) + Middle English cok; see cock1.]
pea′cock′ish, pea′cock′y adj.
of or resembling a peacock; ostentatious
obsolete rare in the manner of a peacock