» This article is about people called professionals. For the movie, see The Professional or Leon. For the TV series, see The Professionals. A professional can be either a person in a profession (certain types of skilled work requiring formal training/education) or in sports (a sportsman/sportwoman doing sports) for payment. Sometimes it's also used to indicate a special level of quality of goods or tools, sometimes also called "commercial grade". Work Definition A professional is a worker requi… (More on Professional)