/ Dictionary / Index I ignition: Meaning and Definition of Find definitions for: ig•ni•tion Pronunciation: (ig-nish'un), [key] — n. the act or fact of igniting; state of being ignited. a means or device for igniting. (in an internal-combustion engine) the process that ignites the fuel in the cylinder. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ignition (Thesaurus) igniter ignition coil 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