/ Dictionary / Index V virulent: Meaning and Definition of Find definitions for: vir•u•lent Pronunciation: (vir'yu-lunt, vir'u-), [key] — adj. actively poisonous; intensely noxious: a virulent insect bite. highly infective; malignant or deadly. causing clinical symptoms. violently or spitefully hostile. intensely bitter, spiteful, or malicious: a virulent attack. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: virulent (Thesaurus) virulence virus Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language