/ Dictionary / Index U United Nations Educational, Scientific, and Cultural Organization: Meaning and Definition of Find definitions for: Unit'ed Na'tions Educa'tional Scientif'ic and Cul'tural Organiza"tion. Pronunciation: [key] See Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. United Nations Day United Nations Organization 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