/ Dictionary / Index C combustion engine: Meaning and Definition of Find definitions for: combus'tion en"gine Pronunciation: [key] any of various types of engines driven by energy produced by combustion. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. combustion chamber combustion tube Related Content Daily Word Quiz: sumptuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language