/ Dictionary / Index W waste gate: Meaning and Definition of Find definitions for: waste' gate" Pronunciation: [key] — Auto. Auto. a valve in a turbocharger unit that automatically opens when a predetermined engine speed is reached, so that some of the exhaust gas to the turbine is diverted and the engine speed does not become excessive. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. wasteful wasteland Related Content Daily Word Quiz: crutiny Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language