Pronunciation: (prok'sē),[key] —n., —pl.prox•ies. 1. the agency, function, or power of a person authorized to act as the deputy or substitute for another.
2. the person so authorized; substitute; agent.
3. a written authorization empowering another person to vote or act for the signer, as at a meeting of stockholders.
4. an ally or confederate who can be relied upon to speak or act in one's behalf.