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English definition of “professional”

professional

noun [C]     /prəˈfeʃənəl/ (informal pro)
a person who has the type of job that needs a high level of education and special training : It's important to gather a team of professionals such as a lawyer , an accountant , and a financial planner to help draw up a plan . health / health care / medical professionals IT/ finance / marketing professionals dedicated / skilled / trained professionals
someone who has worked hard in the same type of job for a long time , and has a lot of skill and knowledge : a true / consummate professional He's a real pro. If you have a large amount of money to invest , it's better to leave it to the pros.
someone who does an activity or a job to earn money , rather than as a hobby : This will be his first game as a professional. → Compare amateur adjective
→ See also health professional
(Definition of professional noun from the Cambridge Business English Dictionary © Cambridge University Press)
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