Breadcrumb Home > Dictionary > Index I illusionary: Meaning and Definition of Find definitions for: il•lu•sion•ar•y Pronunciation: (i-l'zhu-ner"ē), [key] — adj. of, pertaining to, or characterized by illusions; deceptive; misleading. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: illusionary (Thesaurus) illusion illusionism ✖ Related Content Daily Word Quiz: deracinate Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language