/ Dictionary / Index V viaduct: Meaning and Definition of Find definitions for: vi•a•duct Pronunciation: (vī'u-dukt"), [key] — n. a bridge for carrying a road, railroad, etc., over a valley or the like, consisting of a number of short spans. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: viaduct (Thesaurus) via dolorosa vial Related Content Daily Word Quiz: placid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language