/ Dictionary / Index H horizontal union: Meaning and Definition of Find definitions for: hor'izon'tal un'ion Pronunciation: [key] a labor union organized by skills or trades of its members rather than by industries. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. horizontal tasting horme Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language