/ Dictionary / Index E exhaust velocity: Meaning and Definition of Find definitions for: exhaust' veloc"ity Pronunciation: [key] — Rocketry. Rocketry. the velocity, relative to a rocket, at which exhaust gases leave the nozzle of the rocket's engine. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. exhaust system exhedra Related Content Daily Word Quiz: cetacean Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language