n.[C]

1. 纽扣，扣子
2. 按钮
   I pushed the button to turn on the light.

   我按电钮把灯打开。

3. 扣状物
4. 【美】圆形小徽章
5. 无价值的小东西
6. 【美】【俚】少量，一点点
   Her idea is not worth a button.

   她的看法一文不值。

7. 芽，花蕾
8. 【英】【口】（穿制服的）服务员

vt.

1. 扣上，扣住[（+up）]
   He buttoned the top button of his shirt.

   他把衬衣最上面一颗纽扣扣起来。

2. 在……上装纽扣
3. 【口】紧闭（嘴）

vi.

1. 装有纽扣；扣上纽扣

n.

1. a small disc or knob sewn on to a garment, either to fasten it by being pushed through a buttonhole or for decoration.
2. chiefly N. Amer. a decorative badge pinned to clothing.
3. a knob on a piece of electrical or electronic equipment which is pressed to operate it.
4. Fencing  a knob fitted to the point of a foil to make it harmless.

v.

1. fasten or be fastened with buttons.
2. (button it) informal stop talking.
3. (button something up) informal complete something satisfactorily.