The opinion or conviction that sports ought not to be played for money.
The practice, routine, or work of an amateur.
The practice of any art, occupation, online game, etc., as a pastime or an accomplishment, and never as a profession; the quality of becoming an amateur.
the conviction that individuals should participate in recreations as a spare time activity (for the fun of it) in the place of for the money
How would you define amateurism?