/ Dictionary / Index I impactive: Meaning and Definition of Find definitions for: im•pac•tive Pronunciation: (im-pak'tiv), [key] — adj. caused by impact: impactive pain. compelling or impressive: He was deeply moved by the impactive force of the performance. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. impactite impact parameter Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language