/ Dictionary / Index R ruffed grouse: Meaning and Definition of Find definitions for: ruffed' grouse' Pronunciation: [key] a North American grouse, Bonasa umbellus, having a tuft of black feathers on each side of the neck. See illus. under Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ruffed ruffed lemur Related Content Daily Word Quiz: censure Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language