There are multiple definitions - click on the translation that matches your context.

专业的

形容词

full

professional

adjective

Definitions of professional

English

done in a way that is appropriate to a professional person

He is always very professional when it comes to deadlines.

English

having a particular profession (=paid work that needs specialist training over a long period of time) as your main job, rather than being an amateur

He's a professional footballer.