/ Dictionary / Index I immaterialism: Meaning and Definition of Find definitions for: im•ma•te•ri•al•ism Pronunciation: (im"u-tēr'ē-u-liz"um), [key] — n. the doctrine that there is no material world, but that all things exist only in and for minds. the doctrine that only immaterial substances or spiritual beings exist. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. immaterial immateriality 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