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English definition of “proxy”

proxy

noun [C or U] uk   /ˈprɒk.si/ us    /ˈprɑːk-/
authority given to a person to act for someone else, such as by voting for them in an election, or the person who this authority is given to: a proxy vote My brother's voting for me by proxy in the club elections. Can I nominate someone as a proxy to sign for me?ElectionsReplacing and exchanging
(Definition of proxy from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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