0 not clean -- 脏的,肮脏的
Her face was dirty and tear-stained. 她的脸很脏,还留有泪痕。
2 used to describe something that is connected with sex, in a way that many people think is offensive -- 黄色的,色情的,下流的
4 to make something dirty -- 弄脏
It amazes me how you can put up with living in such a dirty house.
There were dirty marks on her trousers where she had wiped her hands.
Just put the dirty dishes in the washing-up bowl, and I'll do them later.