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The level of excellence or competence that is expected of a professional. The professionalism of the employee was unquestionable; for years he had worked diligently and with discretion, earning the accolades of his superiors and peers. The professionalism of the office manager in the doctor's office was a prime example of how all employees should treat a difficult or frustrating situation.
professional. 1  a person practicing a profession. 2  a person who engages in some art, sport, etc. for money, esp. as a means of livelihood, rather than as a hobby. pro (noun) 3  a person who does something with great skill.