- the dull plumage developed in some brightly colored birds after the breeding season.
Origin of eclipse plumage
First recorded in 1905–10
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- seasonal plumage that occurs in certain birds after the breeding plumage and before the winter plumage: characterized by dull coloration
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012