perm

1. N-COUNT If you have a perm, your hair is curled and treated with chemicals so that it stays curly for several months. 烫的卷发

...a middle-aged lady with a perm. …一位烫卷发的中年女士。

2. V-T When a hairstylist perms someone's hair, they curl it and treat it with chemicals so that it stays curly for several months. 烫 (卷发)

She had her hair permed. 她烫了卷发。

3. N permutation的缩写→short for permutation