/ Dictionary / Index V Villari effect: Meaning and Definition of Find definitions for: Vil•la'ri effect" Pronunciation: (vi-lär'ē), [key] — Physics. Physics. the change in magnetic induction that takes place in certain substances when subjected to longitudinal stress. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Villard Villarrica Related Content Daily Word Quiz: penury Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language