prox·y

[prok-see]
noun, plural 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.
Origin:
1400–50; late Middle English prokesye, procusie, contraction of procuracy procuration. See procure, -acy

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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00:10
Proxy is always a great word to know.
So is ninnyhammer. Does it mean:
a fool or simpleton; ninny.
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
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Collins
World English Dictionary
proxy (ˈprɒksɪ) [Click for IPA pronunciation guide]
 
—n , pl proxies
1.  a person authorized to act on behalf of someone else; agent: to vote by proxy
2.  the authority, esp in the form of a document, given to a person to act on behalf of someone else
3.  computing short for proxy server
 
[C15: prokesye, contraction of procuracy, from Latin prōcūrātiō procuration; see procure]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

proxy
c.1440, prokecye, "agency of one who acts instead of another," contraction of Anglo-Fr. procuracie, from M.L. procuratia "administration," from L. procuratio "care, management," from procurare "manage" (see procure).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Cultural Dictionary

proxy definition


A person authorized to act for another, or the written authorization to act for another.

Note: Shareholders in corporations may designate proxies to represent them at stockholders' meetings and vote their shares.
The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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FOLDOC
Computing Dictionary

proxy definition

networking
A process that accepts requests for some service and passes them on to the real server. A proxy may run on dedicated hardware or may be purely software. It may transform the request in some way or provide some additional layer of functionality such as caching or remote access. A proxy may be intended to increase security, e.g. a web proxy that allows multiple clients inside an organisation to access the Internet through a single secure, shared connection.
(2007-09-03)

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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Example sentences
Nor do they propose to criticize the mixing of proxy data and actual
  measurement data.
Get the form and guidelines for appointing a health care proxy.
Serving as the other's consigliere, as well as proxy.
Betting on container rates, which are a proxy for economic activity, may also
  appeal to speculators.
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