/ Dictionary / Index R rainbow roof: Meaning and Definition of Find definitions for: rain'bow roof" Pronunciation: [key] a gable roof in the form of a broad Gothic arch, with gently sloping convex surfaces. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. rainbow fish rainbow runner Related Content Daily Word Quiz: labyrinth Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language