1 [I,T] scratch (at sth) to rub your skin with your nails, especially because it is irritating you (itching) 抓；搔；搔痒: Don't scratch at your insect bites or they'll get worse. 给虫子咬了别去搔，不然越搔越糟糕。Could you scratch my back for me? 你可以给我搔搔背吗？She sat and scratched her head as she thought about the problem. 她坐着一边搔头，一边想问题。

2 [I,T] to make a mark on a surface or a slight cut on a person's skin with sth sharp 抓破；划破；抓伤；划伤: The cat will scratch if you annoy it. 如果你惹恼这只猫，它会抓你的。The table was badly scratched. 桌子被严重划花了。

3 [I] to make a sound by rubbing a surface with sth sharp 用尖物刮擦表面而发出声音: The dog was scratching at the door to go outside. 那狗在抓门，想要出去。

4 [T] to use sth sharp to make or remove a mark 用尖物刻上或刮掉痕迹: He scratched his name on the top of his desk. 他把名字刻在桌面上。I tried to scratch the paint off the table. 我试图刮去桌上的油漆。