名词

1. （门或抽屉的）球形把手
A knob is a round handle on a door or drawer which you use in order to open or close it.

2. （柱子或棍子顶部的）疙瘩，节，球状物
A knob is a rounded lump or ball on top of a post or stick.

3. （机器或设备的）旋钮
A knob is a round switch on a piece of machinery or equipment.

4. 小块（黄油）
A knob of butter is a small amount of it.

1. a round handle

2. a circular rounded projection or protuberance

Synonym: boss

3. an ornament in the shape of a ball on the hilt of a sword or dagger

Synonym: pommel

4. any thickened enlargement

Synonym: nodethickening