D defs.my
Entry 1 sense Webster, 1913

Professionalism

/prəf-ĕsh'-ən-əl-ĭzˌ-əm/ · Pro·fes·sion·al·ism · IPA /pɹəˈfɛʃənəˌlɪzəm/
01 n. The following of a profession, sport, etc., as an occupation; -- opposed to amateurism.
  1. 1.
    The following of a profession, sport, etc., as an occupation; -- opposed to amateurism.