/ Dictionary / Index I incisive: Meaning and Definition of Find definitions for: in•ci•sive Pronunciation: (in-sī'siv), [key] — adj. penetrating; cutting; biting; trenchant: an incisive tone of voice. remarkably clear and direct; sharp; keen; acute: an incisive method of summarizing the issue. adapted for cutting or piercing. of or pertaining to the incisors: the incisive teeth. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: incisive (Thesaurus) incision incisor Related Content Daily Word Quiz: designate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language