/ Dictionary / Index U union label: Meaning and Definition of Find definitions for: un'ion la"bel Pronunciation: [key] a tag or stamped imprint on a product indicating that it has been made by union labor. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. union jack union language Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language