a man’s personal servant who takes care of his clothes, serves his meals, etc. （照管男子衣食等的）贴身仆人，仆从 His valet brought him his letters. 他的贴身仆人给他送来了信件。
a hotel employee whose job is to clean the clothes of hotel guests （旅馆中）为顾客洗衣服的服务员 - (especially North American English)
a person who parks your car for you at a hotel or restaurant （旅馆或餐厅）为顾客停车的服务员
Word Originlate 15th cent. (denoting a footman acting as an attendant to a horseman): from French; related to vassal.