/ Dictionary / Index U U.K.: Meaning and Definition of Find definitions for: U.K. Pronunciation: [key] United Kingdom. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: uk (Thesaurus) Ujung Pandang ukase Related Content Daily Word Quiz: slough Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language