/ Dictionary / Index E exch.: Meaning and Definition of Find definitions for: exch. Pronunciation: [key] exchange. exchequer. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. excess sound pressure exchange Related Content Daily Word Quiz: blanch Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language