Breadcrumb Home > Dictionary > Index O Cite Oahu: Meaning and Definition of Find definitions for: O•a•hu Pronunciation: (?-'h), [key] ? n. an island in central Hawaii: third largest and most important island of the state; location of Honolulu. 630,528; 589 sq. mi. (1525 sq. km). Random House Unabridged Dictionary, Copyright 1997, by Random House, Inc., on Infoplease. See also: oahu (Thesaurus) oaf oak TrendingHere are the facts and trivia that people are buzzing about. February 2021 Current Events: US News The Berlin Conference and the Partition of Africa The Implied Powers of Congress The Women's March on Versailles Keeping Your Brain Active in a COVID-19 World The Manchu Related Content Daily Word Quiz: internecine Analogy of the Day: Today?s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language