decider
noun [ C ] uk/dɪˈsaɪ.dər/ us/dɪˈsaɪ.ɚ/
(GAME)
mainly UK决胜局；决定性的比赛；决定性的得分
a final game or competition that allows one person or team to win, or the winning point scored
They lost what was regarded as the championship decider at Leeds. 他们在利兹输掉了被视为冠军争夺战的比赛。
Jones scored the decider in the final minute. 琼斯在最后一分钟攻入了制胜球。
(PERSON)
mainly US决定者，裁决者
a person who makes the decisions in a particular situation
The president is the decider in these matters. 总统是这些事务的决策者。