/ Dictionary / Index R riata: Meaning and Definition of Find definitions for: ri•a•ta Pronunciation: (rē-ä'tu, -at'u), [key] — n. a lariat. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: riata (Thesaurus) riant rib Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language