contestant  
noun [ C ] uk/kənˈtes.tənt/ us/kənˈtes.t̬ənt/
  (COMPETITION)      
 C1 参赛选手;竞争者
someone who competes in a contest
  In tonight's quiz, our contestants have come from all over the country. 参加今晚知识竞赛的选手们来自全国各地。 
   (ATTEMPT)      
 争夺者;竞争者
someone who attempts to win an election or get power or control
  Two main candidates are emerging as contestants for the presidency. 两位主要候选人最终脱颖而出成为总统职位的有力竞争者。