player in WordNet English dictionary

1. a theatrical performer
   actor  histrion  player  thespian  role player 
   
2. someone who plays a musical instrument (as a profession)
   musician  instrumentalist  player 
   
3. a person who participates in or is skilled at some game
   player  participant 
   
4. an important participant (as in a business deal)
   "he was a major player in setting up the corporation"
   player 
   
5. a person who pursues a number of different social and sexual partners simultaneously
   player