vt.

1. 改变
   Has she altered her mind?

   她改变主意了吗？

2. 修改
   The tailor altered the jacket to fit me.

   裁缝将夹克修改得合我的身。

   The tailor altered the coat to make it shorter.

   裁缝把大衣改短了。

3. 【俚】阉割，去势

vi.

1. 改变，变样
   The city has altered almost out of recognition since I left there five years ago.

   自从五年前我离开以后，那座城市已变得几乎认不出了。

   alter for the better/worse

   变好/坏

v.

1. change in character, appearance, or composition.
2. N. Amer. & Austral. castrate or spay (a domestic animal).