Definition from macmillandictionary.com
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Every applicant is entitled to good professional advice.
Teachers must be free to exercise their professional judgment.
the firm with the most professional approach to marketing
I congratulate you on a thoroughly professional job, done in difficult conditions.
The whole cast was very professional and hard working in rehearsals.
They want me to dress in a more professional way.
managerial and professional employees
We’ve got a good professional relationship, but I wouldn’t say we’re friends.
a professional actor/footballer/photographer