One who engages in an art, science, study, or athletic activity as a pastime rather than as a profession, One lacking the skill of a professional, as in an art, adjective_ Not professional; unskillful, lacking professional skill or expertise
Of, relating to, engaged in, or suitable for a profession, Performed by persons receiving pay, Having or showing great skill; expert, noun_ One who earns a living in a given or implied occupation, Specifically, a person who makes his living by an art, game, or sport in which amateurs are accustomed to engage for amusement or recreation, a person engaged in one of the learned professions