/ Dictionary / Index U UMW: Meaning and Definition of Find definitions for: UMW Pronunciation: [key] United Mine Workers. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Umtata un Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language