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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 - of or relating to a profession; we need professional advice; professional training; professional equipment for his new office. 5. professional - engaged in by members of a profession; professional occupations include medicine and the law and teaching.