Breadcrumb Home > Dictionary > Index E eclipse plumage: Meaning and Definition of Find definitions for: eclipse' plum"age Pronunciation: [key] — Ornith. Ornith. the dull plumage developed in some brightly colored birds after the breeding season. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. eclipse eclipsing variable ✖ Related Content Daily Word Quiz: derogate Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language