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definitive plumage: Meaning and Definition of

defin'itive plum'age

Pronunciation: [key]
— Ornith. Ornith.
  1. the plumage of a bird that, once attained, does not change significantly in color or pattern for the rest of the bird's life.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.