(adj) having or demonstrating ability to recognize or draw fine distinctions, Syn. piercing, knifelike, keen, penetrative, incisive, penetrating, discriminating, sharp, Example:an acute observer of politics and politicians; incisive comments; icy knifelike reasoning; as sharp and incisive as the stroke of a fang; penetrating insight; frequent penetrative observations
(adj) tending to penetrate; having the power of entering or piercing, Syn. penetrating, Example:a toxic penetrative spray applied to the surface; a cold penetrating wind; a penetrating odor