/ Dictionary / Index G gas engine: Meaning and Definition of Find definitions for: gas' en'gine Pronunciation: [key] an internal-combustion engine driven by a mixture of air and gas. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Gascoyne-Cecil gaseous 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