/ Dictionary / Index V vasospasm: Meaning and Definition of Find definitions for: vas•o•spasm Pronunciation: (vas'ō-spaz"um, vā'zō-), [key] — n. sudden constriction of an artery, leading to a decrease in its diameter and in the amount of blood it can deliver. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. vasopressor vasostimulant Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language