a. [ Cf. F. incisif. ] [ 1913 Webster ]
1. Having the quality of incising, cutting, or penetrating, as with a sharp instrument; cutting; hence, sharp; acute; sarcastic; biting; trenchant. “An incisive, high voice.” G. Eliot. [ 1913 Webster ]
And her incisive smile accrediting
That treason of false witness in my blush. Mrs. Browning. [ 1913 Webster ]
2. (Anat.) Of or pertaining to the incisors; incisor; as, the incisive bones, the premaxillaries. [ 1913 Webster ]
3. Clearly and succinctly stated, with penetrating insight into the issue at hand; as, an incisive comment. [ PJC ]