/ Dictionary / Index V virulence: Meaning and Definition of Find definitions for: vir•u•lence Pronunciation: (vir'yu-luns, vir'u-), [key] — n. quality of being virulent. the relative ability of a microorganism to cause disease; degree of pathogenicity. the capability of a microorganism to cause disease. venomous hostility. intense sharpness of temper. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: virulence (Thesaurus) virucide virulent 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