player

(noun) a person who participates in or is skilled at some game. Synonyms: participant.

(noun) someone who plays a musical instrument (as a profession). Synonyms: musician, instrumentalist.

(noun) a theatrical performer. Synonyms: actor, histrion, thespian, role player.

(noun) a person who pursues a number of different social and sexual partners simultaneously.

(noun) an important participant (as in a business deal). Examples: "He was a major player in setting up the corporation."