/ Dictionary / Index O outgas: Meaning and Definition of Find definitions for: out•gas Pronunciation: (out'gas", out"gas'), [key] — v., -gassed, -gas•sing. —v.t. to remove (adsorbed or occluded gases), usually by heat or reduced pressure. —v.i. to lose gas. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. outfrown outgeneral Related Content Daily Word Quiz: soporific Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language