/ Dictionary / Index I illustration: Meaning and Definition of Find definitions for: il•lus•tra•tion Pronunciation: (il"u-strā'shun), [key] — n. something that illustrates, as a picture in a book or magazine. a comparison or an example intended for explanation or corroboration. the act or process of illuminating. the act of clarifying or explaining; elucidation. illustriousness; distinction. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: illustration (Thesaurus) illustrated illustrational Related Content Daily Word Quiz: sequester Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language