person who is paid to undertake a specialized set of tasks and to complete them for a fee From Wikipedia, the free encyclopedia
A professional is someone who has a specialised job which only very well trained people can perform, such as Doctors, lawyers, and teachers. These occupations are known as professional occupations. They may often get paid more than other people. In sport, a professional is someone who is paid to play. For example, Petra Kvitová and Tim Cahil are professional sportspeople.
The word "professional" is often used as an adjective, e.g.
The opposite of "professional" in this sense is: "unprofessional".
Another word that is the opposite of "professional" is "amateur". This means that someone does not get paid for the job he is doing (even if he may be doing it very well).
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