proxy
nounOne appointed or authorized to act for another, especially a person appointed to vote as one wishes at a meeting.
nounThe authority to act for another.
nounThe written authorization to act in place of another.
nounAn entity or variable used to model or generate data assumed to resemble the data associated with another entity or variable that is typically more difficult to research.
nounThe agency of a substitute; the office or authority of one who is deputed to act for another.
nounOne who is deputed to represent or act for another; a deputy.
nounA document authorizing one person to act as substitute or deputy for another; a written authorization to exercise the powers and prerogatives of others.
nounThat which takes the place of something else; a substitute.
nounEccles., same as