/ Dictionary / Index O Omar Khayyám: Meaning and Definition of Find definitions for: O•mar Khay•yám Pronunciation: (ō'mär kī-yäm', -yam', ō'mur), [key] died 1123?, Persian poet and mathematician. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Omar omasum Related Content Daily Word Quiz: reclusive Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language