/ Dictionary / Index O occasionalism: Meaning and Definition of Find definitions for: oc•ca•sion•al•ism Pronunciation: (u-kā'zhu-nl-iz"um), [key] — n. Philos. a theory that there is no natural interaction between mind and matter, but that God makes mental events correspond to physical perceptions and actions. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. occasional occasionally Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language