participant participant /pɑːrˈtɪsəpənt/

noun

1. () Someone who takes part in an activity  ( player , participant )
   someone who takes part in an activity
    He was a major player in setting up the corporation
   he was a major player in setting up the corporation
   
2. A person who participates in or is skilled at some game  ( participant , player )
   a person who participates in or is skilled at some game
    The rugby player showed impressive skills and speed as he weaved his way through the opposing team's defense
   The rugby player showed impressive skills and speed as he weaved his way through the opposing team's defense