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English definition of “professional”

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professional

adjective
 
 
/prəˈfeʃənəl/
[before noun] related to work that needs a high level of education or special training: professional advice/judgments/opinions You should seek professional advice before doing this.a professional background/career/life She has spent the bulk of her professional life working in the public sector.professional experience/qualifications/training The importance of professional qualifications varies enormously between different industries. a professional association/body/organization professional services/skills/standards
having the type of job that is respected because it involves a high level of education and training: Many of those who want to rent are single, professional people who do not want to share.
having the qualities that you connect with trained people, such as being organized and showing a high standard of work: It would look more professional if the letter were typed. He has behaved in a very professional way. a professional environment/relationship
suitable for a person working in a particular profession: professional accountability/conduct/misconduct He is now facing charges of serious professional misconduct.
( also informal pro) doing an activity or a job to earn money, rather than as a hobby: a professional athlete pro football/sports →  Compare amateur adjective
(Definition of professional adjective from the Cambridge Business English Dictionary © Cambridge University Press)
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