/ Dictionary / Index O Oman: Meaning and Definition of Find definitions for: O•man Pronunciation: (ō-män'), [key] — n. Formerly,an independent sultanate in SE Arabia. 800,000; ab. 82,800 sq. mi. (212,380 sq. km). Cap.: Muscat. a NW arm of the Arabian Sea, at the entrance to the Persian Gulf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: oman (Thesaurus) Omaha Omani Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language