Engaged in, done, or performed by an amateur or amateurs. Also: suitable for or used by amateurs.

= pro-am, adj.

Used attributively (now usually as one word) with reference to sports and games of the kind played by amateurs in a sand lot.

Designating or relating to an event, esp. a golfing tournament, in which professionals and amateurs play together.

spec. Designating sport, or an individual sport, in which no physical contact between opponents is allowed. Frequently in non-contact sport(s).

Designating or relating to a (sporting) event in which professionals and celebrities participate together. Cf. pro-amateur, adj.

= pro-celebrity, adj.

Sport. That is a reserve (sense A. 12). Also: (of a team, game, etc.) consisting of or played by reserves.