/ Dictionary / Index R Riyadh: Meaning and Definition of Find definitions for: Ri•yadh Pronunciation: (rē-yäd'), [key] — n. a city in and the capital of Saudi Arabia. 450,000. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: riyadh (Thesaurus) rix-dollar riyal Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language