/ Dictionary / Index R roof iris: Meaning and Definition of Find definitions for: roof' i"ris Pronunciation: [key] an iris, Iris tectorum, of China and Japan, having frilled, violet or white flowers. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. roofing nail roofless 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