drum

1. N-COUNT A drum is a musical instrument consisting of a skin stretched tightly over a round frame. You play a drum by beating it with sticks or with your hands. 鼓

...a worker who died after collapsing while beating a drum during a demonstration. …一个在游行时因击鼓过度劳累而倒毙的工人。

2. N-COUNT A drum is a large cylindrical container which is used to store fuel or other substances. 鼓状容器

...an oil drum. …一只油桶。

3. V-T/V-I If something drums on a surface, or if you drum something on a surface, it hits it regularly, making a continuous beating sound. 连续敲击

He drummed his fingers on the leather top of his desk. 他用手指不停地敲击皮桌面。