proxy
noun
uk/ˈprɒksi/ us [ C or U ]
a written document that officially gives someone the authority to do something for another person, for example by voting at a meeting for them:
A creditor may give a proxy to any person of full age requiring him or her to vote for or against any specified resolution.
proxy materials/cards/forms
[ C or U ]
a person who you choose to do something officially for you, for example to vote at a meeting or in an election when you are not able to vote yourself:
Your proxy does not necessarily have to sign the form himself or herself.
Any patron with a registered ballot book may participate in the minimum-bid auction in person Saturday, or via proxy.
proxy votes/voting
by proxy
if you do something by proxy, you officially ask someone else to do it for you:
New rules have ended the practice of allowing members to vote by proxy.
[ C ]
a situation, process, or activity to which another situation, etc. is compared, especially in order to calculate how successful or unsuccessful it is:
a proxy for sth Wall Street typically uses volume growth as a proxy for the underlying health of a business.