/ Dictionary / Index U United Nations Organization: Meaning and Definition of Find definitions for: Unit'ed Na'tions Organiza"tion Pronunciation: [key] the United Nations. Abbr.: UNO, U.N.O. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. United Nations Educational, Scientific, and Cultural Organization United Presbyterian Related Content Daily Word Quiz: portent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language