/ Dictionary / Index G gas-operated: Meaning and Definition of Find definitions for: gas-op•er•at•ed Pronunciation: (gas'op"u-rā"tid), [key] — adj. (of a firearm) using some of the exhaust gases to operate the action. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. gasometry gasp Related Content Daily Word Quiz: fidelity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language