/ Dictionary / Index R resistor: Meaning and Definition of Find definitions for: re•sis•tor Pronunciation: (ri-zis'tur), [key] — n. Elect. a device designed to introduce resistance into an electric circuit. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: resistor (Thesaurus) resistless resist printing Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language