/ Dictionary / Index R rotunda: Meaning and Definition of Find definitions for: ro•tun•da Pronunciation: (rō-tun'du), [key] — n. a round building, esp. one with a dome. a large and high circular hall or room in a building, esp. one surmounted by a dome. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: rotunda (Thesaurus) rotund rotundity Related Content Daily Word Quiz: resilient Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language