player Definition

1. Someone who plays.
2. Someone who participates in a game or sport, particularly as their profession.

Thesaurus: athlete, competitor, contestant, opponent, jock (US slang).
3. colloq
A participant in a particular activity, especially a powerful one.
Example: a major player in the mafia scene
4. A performer on a musical instrument.

Example: guitar player
5. old use
An actor.
Thesaurus: actor, actress, performer, entertainer, thespian, ham (slang).