/ Dictionary / Index V varistor: Meaning and Definition of Find definitions for: var•is•tor Pronunciation: (va-ris'tur, vu-), [key] — n. Elect. a resistor whose resistance automatically varies in proportion to the voltage of the current through it. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. varisized varitype Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language