a.

1. 尖锐的；敏锐的
   He is a man of acute intelligence.

   他非常聪颖。

2. 剧烈的，激烈的
   She complained of acute pains in her chest.

   她说胸部有剧痛。

3. 严重的
   It is urgent that the acute problem of air pollution in the city be solved.

   该城市空气污染这一严重问题亟须解决。

4. 【医】急性的
   He fell ill with acute appendicitis.

   他得了急性阑尾炎。

5. 【数】锐角的
6. 高音的，尖声的
7. 【语】尖（重）音的[B]

adj.

1. critical; serious:
   an acute housing shortage.
   ▸(of an illness) coming sharply to a crisis; severe. Often contrasted with chronic.
2. perceptive; shrewd.
   ▸(of a physical sense or faculty) highly developed.
3. (of an angle) less than 90°.
4. (of a sound) high; shrill.

n.