/ Dictionary / Index B barrel roof: Meaning and Definition of Find definitions for: bar'rel roof" Pronunciation: [key] a roof or ceiling having a semicylindrical form. See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. barrel roll barrel vault Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language