Pronunciation: (prok'sē), [key]
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.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.