/ Dictionary / Index R riant: Meaning and Definition of Find definitions for: ri•ant Pronunciation: (rī'unt, rē'- Fr. ryän), [key] — adj. laughing; smiling; cheerful; gay. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: riant (Thesaurus) rialto riata 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