a trained person whose job is to improve the appearance of a customer's face, hair, or skin using make-up and beauty treatments

The cosmetologist told her about a new product for rejuvenating the skin. 美容师告诉她一种新产品可以使皮肤恢复活力。

His wife works full-time as a cosmetologist. 他的妻子是一名全职的美容师。