1 (only before a noun 只用于名词前) connected with a job that needs a high level of training and/or education 专业的；职业的: Get professional advice from your lawyer before you take any action. 采取任何行动之前，应先征询你的律师的专业意见。

2 doing sth in a way that shows skill, training or care 在行的；胜任的；专业的: The police are trained to deal with every situation in a calm and professional manner. 警察都受过训练，能够以冷静而专业的方式应付各种情况。Her application was neatly typed and looked very professional. 她的申请书打得很整洁，看来很有专业水平。 [OPP] unprofessional 反义词为unprofessional

3 doing a sport, etc as a job or for money; (used about a sport, etc) done by people who are paid 职业的；领薪的: He's planning to turn professional after the Olympics. 他打算在奥林匹克运动会后转为职业运动员。professional football 职业足球 [OPP] amateur 反义词为amateur