/ Dictionary / Index R round arch: Meaning and Definition of Find definitions for: round' arch' Pronunciation: [key] an arch formed in a continuous curve, esp. in a semicircle. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. round angle round barrow Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language