/ Dictionary / Index I impactite: Meaning and Definition of Find definitions for: im•pact•ite Pronunciation: (im-pak'tīt, im'pak-tīt"), [key] — n. a glassy or crystalline material composed of slag and meteoric materials, produced by the impact of a meteorite striking the earth. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. impaction impactive 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