/ Dictionary / Index T throttle valve: Meaning and Definition of Find definitions for: throt'tle valve" Pronunciation: [key] a valve for throttling the working fluid of an engine, refrigerator, etc. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. throttle lever through Related Content Daily Word Quiz: morose Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language