/ Dictionary / Index E exhaust manifold: Meaning and Definition of Find definitions for: exhaust' man"ifold Pronunciation: [key] — Auto. Auto. a component of the exhaust system consisting of a collection of tubes, usually of cast iron, that channel the exhaust gases from the cylinders of an engine to the rest of the exhaust system. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. exhaustless exhaust system 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