/ Dictionary / Index E exhaustless: Meaning and Definition of Find definitions for: ex•haust•less Pronunciation: (ig-zôst'lis), [key] — adj. inexhaustible. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. exhaustive exhaust manifold 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