IPA: /ˈprɒk.si/
KK: /ˈprɒk.si/
A person or document that has the power to act on behalf of someone else.
She appointed her brother as her proxy to vote in the election.
Proxy → It originates from the Latin word 'procurare' (meaning to take care of or manage) and the prefix 'pro-' (meaning for or in favor of). A proxy is someone who acts on behalf of another, thus taking care of their interests.
Think of someone acting 'for' ('pro-') another person to 'manage' ('curare') their affairs — that's why a proxy represents someone else.