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English definition of “arbiter”

arbiter

noun [C]     /ˈɑːbɪtər/
someone whose opinion has a lot of influence : arbiter of fashion/style/taste He rose from polite but humble beginnings to become an arbiter of taste and manners .
LAW a person or organization that has the power to make a decision about what is acceptable or legal : the final/sole/ultimate arbiter It is the country's parliament which remains the final arbiter of which laws are passed and in what form .
(Definition of arbiter noun from the Cambridge Business English Dictionary © Cambridge University Press)
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