/ Dictionary / Index A air injection: Meaning and Definition of Find definitions for: air' injec"tion Pronunciation: [key] injection of liquid fuel into the cylinder of an internal-combustion engine, esp. a diesel, by means of a jet of compressed air. Cf. solid injection. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. airing airish 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