An arbiter is a person or institution that judges and settles a quarrel between two other people or groups.
例句
He was the ultimate arbiter on both theological and political matters.他在神学和政治事务上都是最终的仲裁人。...the court's role as arbiter in the law-making process.法庭在制定法律过程中担任裁决机构的角色
N-COUNT
(时尚或风格的)权威,决定者
An arbiter of taste or style is someone who has a lot of influence in deciding what is fashionable or socially desirable.
例句
Sequins have often aroused the scorn of arbiters of taste.闪光装饰片经常引起时尚引领者的鄙视。