Pronunciation: (in-sī'siv), [key]
1. penetrating; cutting; biting; trenchant: an incisive tone of voice.
2. remarkably clear and direct; sharp; keen; acute: an incisive method of summarizing the issue.
3. adapted for cutting or piercing.
4. of or pertaining to the incisors: the incisive teeth.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.