/ Dictionary / Index I illuviate: Meaning and Definition of Find definitions for: il•lu•vi•ate Pronunciation: (i-l'vē-āt"), [key] — -at•ed, -at•ing. to undergo illuviation. to produce illuviation. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. illuvial illuviation Related Content Daily Word Quiz: hedonist Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language