/ Dictionary / Index M material implication: Meaning and Definition of Find definitions for: mate'rial implica'tion Pronunciation: [key] equivalence (def. 4a). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. material equivalence materialism Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language