duplicate

[n., adj. doo-pli-kit, dyoo-; v. doo-pli-keyt, dyoo-]
noun
1.
a copy exactly like an original.
2.
anything corresponding in all respects to something else.
3.
Cards. a duplicate game.
verb (used with object), duplicated, duplicating.
4.
to make an exact copy of.
5.
to do or perform again; repeat: He duplicated his father's way of standing with his hands in his pockets.
6.
to double; make twofold.
verb (used without object), duplicated, duplicating.
7.
to become duplicate.
adjective
8.
exactly like or corresponding to something else: duplicate copies of a letter.
9.
consisting of or existing in two identical or corresponding parts; double.
10.
Cards. noting a game in which each team plays a series of identical hands, the winner being the team making the best total score.
Idioms
11.
in duplicate, in two copies, especially two identical copies: Please type the letter in duplicate.

Origin:
1400–50; late Middle English < Latin duplicātus (past participle of duplicāre to make double), equivalent to duplic- (stem of duplex) duplex + -ātus -ate1

duplicative, adjective
nonduplicating, adjective
nonduplicative, adjective
preduplicate, verb (used with object), preduplicated, preduplicating.
quasi-duplicate, adjective
self-duplicating, adjective
unduplicated, adjective
unduplicative, adjective


1. facsimile, replica, reproduction. 4. See imitate. 9. twofold.


1. original.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
duplicate
 
adj
1.  copied exactly from an original
2.  identical
3.  existing as a pair or in pairs; twofold
 
n
4.  an exact copy; double
5.  something additional or supplementary of the same kind
6.  two exact copies (esp in the phrase in duplicate)
 
vb
7.  (tr) to make a replica of
8.  (tr) to do or make again
9.  (tr) to make in a pair; make double
10.  (intr) biology to reproduce by dividing into two identical parts: the chromosomes duplicated in mitosis
 
[C15: from Latin duplicāre to double, from duo two + plicāre to fold]
 
duplicable
 
adj
 
duplica'bility
 
n
 
'duplicately
 
adv
 
'duplicative
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Etymonline
Word Origin & History

duplicate
early 15c., from L. duplicatus, pp. of duplicare "to double," from duo "two" + plicare "to fold" see ply (v.)). The noun is first recorded 1530s. The verb is attested from 1620s. Related: Duplicated; duplicating.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
The university also saved money through reducing duplicative work, such as
  certain business functions.
He looked at excess, wasteful, duplicative spending.
In some cases, the questions have been duplicative, but many are original and
  quite thoughtful.
As an example, he cited duplicative tests ordered by different doctors for the
  same patient.
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