Breadcrumb Home > Dictionary > Index I illuminating: Meaning and Definition of Find definitions for: il•lu•mi•nat•ing Pronunciation: (i-l'mu-nā"ting), [key] — adj. giving or casting light. informative; enlightening. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: illuminating (Thesaurus) illuminati illumination ✖ Related Content Daily Word Quiz: quadrumanous Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language