/ Dictionary / Index I ion exchange: Meaning and Definition of Find definitions for: i'on exchange" Pronunciation: [key] the process of reciprocal transfer of ions between a solution and a resin or other suitable solid. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Ionesco ion generator Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language