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definitive plumage

American  

noun

Ornithology.

  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.

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.

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