1 [peer]
a person of the same legal status: a jury of one's peers.
a person who is equal to another in abilities, qualifications, age, background, and social status.
something of equal worth or quality: a sky-scraper without peer.
a nobleman.
a member of any of the five degrees of the nobility in Great Britain and Ireland (duke, marquis, earl, viscount, and baron).
Archaic. a companion.

1175–1225; Middle English per < Old French per < Latin pār equal Unabridged


2 [peer]
verb (used without object)
to look narrowly or searchingly, as in the effort to discern clearly.
to peep out or appear slightly.
to come into view.

1585–95; perhaps aphetic variant of appear

peeringly, adverb

1. See peep1. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
peer1 (pɪə)
1.  a member of a nobility; nobleman
2.  See also life peer a person who holds any of the five grades of the British nobility: duke, marquess, earl, viscount, and baron
3.  a.  a person who is an equal in social standing, rank, age, etc
 b.  (as modifier): peer pressure
4.  archaic a companion; mate
[C14 (in sense 3): from Old French per, from Latin pār equal]

peer2 (pɪə)
1.  to look intently with or as if with difficulty: to peer into the distance
2.  to appear partially or dimly: the sun peered through the fog
[C16: from Flemish pieren to look with narrowed eyes]

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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Word Origin & History

c.1300, "an equal in civil standing or rank" (1215 in Anglo-L.), from Anglo-Fr. peir, O.Fr. per (10c.), from L. par "equal." Sense of "noble" (1382) is from Charlemagne's Twelve Peers in the old romances, like knights of the Round Table, originally so called because all were equal. Sociological sense
of "one of the same age group or social set" is from 1944. Peerage first recorded 1454. Peer review is first recorded 1971.

1590s, variant of piren (late 14c.), with a long -i-, probably related to or from E. Fris. piren "to look," of uncertain origin. Influenced in form and sense by M.E. peren (late 14c.), aphetic form of aperen (see appear).
Online Etymology Dictionary, © 2010 Douglas Harper
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Computing Dictionary

peer definition

A unit of communications hardware or software that is on the same protocol layer of a network as another. A common way of viewing a communications link is as two protocol stacks, which are actually connected only at the very lowest (physical) layer, but can be regarded as being connected at each higher layer by virtue of the services provided by the lower layers. Peer-to-peer communication refers to these real or virtual connections between corresponding systems in each layer.
To give a simple example, when two people talk to each other, the lowest layer is the physical layer which concerns the sound pressure waves travelling from mouth to ear (so mouths and ears are peers) the next layer might be the speech and hearing centres in the people's brains and the top layer their cerebellums or minds. Although, barring telepathy, nothing passes directly between the two minds, there is a peer-to-peer communication between them.
The Free On-line Dictionary of Computing, © Denis Howe 2010
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American Heritage
Abbreviations & Acronyms
  1. Performance Efficiency Evaluation Report

  2. Program for Extraordinary Experience Research

The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences
They bring you a mirror and you peer and stare.
Sighting movement, he began to peer through his scope.
These three phenomena are what provide the blur when earthbound astronomers attempt to peer at the stars with precision.
Wandering around the sprawling harvest market, I peer into tents filled with dates, peppers and pumpkins.
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