a.

1. 拉紧的，绷紧的
   Pull the string taut.

   把线拉紧。

2. 紧张的，不自然的
   a taut expression on his face

   他脸上的紧张神情

3. 整洁的，秩序井然的

adj.

1. stretched or pulled tight.
   ▸(of muscles or nerves) tense.
2. (of writing, music, etc.) concise and controlled.
3. (of a ship) having a disciplined crew.