/ Dictionary / Index I injector: Meaning and Definition of Find definitions for: in•jec•tor Pronunciation: (in-jek'tur), [key] — n. a person or thing that injects. a device for injecting feedwater into a boiler against high pressure by means of a jet of steam. Also calledfuel injector.a mechanism consisting of a pump, valves, and nozzles for spraying fuel into the cylinders of an internal-combustion engine. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: injector (Thesaurus) injection molding in-joke Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language