proxy 
/ˈprɑ:ksi/ noun
plural prox·ies /ˈprɑ:ksi/ noun 1 [count] : a person who is given the power or authority to do something (such as to vote) for someone else
▪ Since I wouldn't be available to vote, I nominated him to act as my proxy. — often + for ▪ He served as a proxy for his uncle. 2 [noncount] : power or authority that is given to allow a person to act for someone else — usually used in the phrase by proxy ▪ I voted by proxy. [=by giving another person the authority to vote for me]
▪ Since I wouldn't be available to vote, I nominated him to act as my proxy. — often + for ▪ He served as a proxy for his uncle.
— proxy adjective always used before a noun
▪ a proxy vote
▪ a proxy vote
