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Entry 3 senses · 2 variants Webster, 1913

Professional

/prəf-ĕsh'-ən-əl/ · Pro·fes·sion·al · IPA /pɹəˈfɛʃ.ə.nəl/
01 a. Of or pertaining to a profession, or calling; conforming to the rules or standards of a profession; following a profession; as, professiona…
  1. 1.
    Of or pertaining to a profession, or calling; conforming to the rules or standards of a profession; following a profession; as, professional knowledge; professional conduct.
  2. 2.
    Engaged in by professionals; as, a professional race; -- opposed to amateur.
02 n. A person who prosecutes anything professionally, or for a livelihood, and not in the character of an amateur; a professional worker.
  1. 1.
    A person who prosecutes anything professionally, or for a livelihood, and not in the character of an amateur; a professional worker.