a.

1. 尖銳的；敏銳的
   He is a man of acute intelligence.

   他非常聰穎。

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

   她自訴胸部劇痛。

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

   該城市空氣汙染這一嚴重問題急須解決。

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

   他得了急性闌尾炎。

5. 【數】銳角的
6. 高音的，尖聲的
7. 【語】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.