Breadcrumb Home > Dictionary > Index K KO: Meaning and Definition of Find definitions for: KO Pronunciation: (n.kā'ō', kā'ō"v.kā'ō'), [key] — n., pl. v., KO's, KO'd, KO'ing. —n. a knockout in boxing. —v.t. to knock unconscious, esp. in a boxing match; knock out. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ko (Thesaurus) Knut koa TrendingHere are the facts and trivia that people are buzzing about. Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 12 Steps to a New Year New Year's Resolution to Slim Down? Martin Luther King Speeches Books of the Bible: Old Testament Books in Order ✖ Related Content Daily Word Quiz: antebellum Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language