/ Dictionary / Index I infusionism: Meaning and Definition of Find definitions for: in•fu•sion•ism Pronunciation: (in-fy'zhu-niz"um), [key] — n. Theol. the doctrine that the soul existed in a previous state and is infused into the body at conception or birth. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. infusion infusive Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language