/ Dictionary / Index I illustrational: Meaning and Definition of Find definitions for: il•lus•tra•tion•al Pronunciation: (il"u-strā'shu-nl), [key] — adj. of, pertaining to, or characteristic of illustrations: illustrational art. used for purposes of illustration; serving to illustrate; illustrative. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. illustration illustrative 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