Definition of duplicate in English:

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Pronunciation: /ˈd(y)o͞opləkət/
1Exactly like something else, especially through having been copied: a duplicate license is issued to replace a valid license which has been lost
More example sentences
  • They were duplicate copies that the commission had.
  • For example, I never realised you should keep duplicate copies of receipts.
  • And beyond duplicate copies, we just don't have that much space here anyway!
matching, identical, twin, corresponding, equivalent
2Having two corresponding or identical parts: a duplicate application form
More example sentences
  • Basically, identical and duplicate infrastructure components serve the critical systems.
2.1Twice as large or many; doubled: duplicate taxes on oil and gas
More example sentences
  • Their accounts payable team recently had its accounts payable reviewed for potential duplicate payments and sales tax overpayments.


Pronunciation: /ˈd(y)o͞opləkət/
1One of two or more identical things: books may be disposed of if they are duplicates
More example sentences
  • Now things are sorted, you should be able to identify duplicates, spares, and rubbish.
  • What you really need is some kind of weighted-sampling without replacement (which you can simulate by throwing out duplicates, but then you waste time trying to find a reasonable sample).
  • The pair were both head down reading duplicates of some glossy brochures.
1.1A copy of an original: locksmiths can make duplicates of most keys
More example sentences
  • Portraiture is an art unusually bedevilled by duplicates and copies.
  • Another similar statue was erected at the British Museum, and a duplicate of the statue was specially made in Britain and imported to sit by the new development.
  • A point-in-time copy represents an exact duplicate of a data volume at the moment the copy was created.
copy, photocopy, facsimile, reprint;
replica, reproduction, clone
dated carbon copy
informal dupe
trademark Xerox
2 short for duplicate bridge.
Example sentences
  • The method of doing this comparison varies according to what kind of duplicate is being played.
3 archaic A pawnbroker’s ticket.
Example sentences
  • And then you got another ticket, called the duplicate, with the date changed and another stamp on it.


Pronunciation: /ˈd(y)o͞opləˌkāt/
[with object]
1Make or be an exact copy of: a unique scent, impossible to duplicate or forget figurative they have not been able to duplicate his successes
More example sentences
  • Simply, we're now able to copy an atom, duplicating everything about it except its position and velocity in a new atom somewhere else.
  • I have taken pictures in rain and snow and duplicated exact copies of this same type of picture in the past for experimentation purposes.
  • More likely, they thought they could duplicate the Spain success.
copy, photocopy, xerox, reproduce, replicate, reprint, run off
dated mimeograph
repeat, do again, redo, replicate
1.1Make or supply copies of (a document): information sheets had to be typed and duplicated (as adjective duplicating) a duplicating machine
More example sentences
  • Without a network of distributors and media organizations, video documentation was less easily duplicated and disseminated in the 1970s than it is today
  • Friday sees the programme being finished, duplicated and about 150 copies hand stapled into the outer covers.
  • Digital images displayed on a computer screen lack the resolution of photographic prints but have the advantage of being more easily stored, duplicated, and delivered for study.
1.2Multiply by two; double: the normal amount of DNA has been duplicated thousands of times
1.3Do (something) again unnecessarily: most of these proposals duplicated work already done
More example sentences
  • Now the president is saying, oh, well, we might give you tax relief if you will sign on to my prescription drug proposal, which duplicates coverage that's already provided.
  • Research that duplicates other work unnecessarily or which is not of sufficient quality to contribute something useful to existing knowledge is unethical
  • Alliances create better communities which tap into the strength of their multiple institutions and decrease unnecessarily duplicated resources.


in duplicate

Consisting of two exact copies: forms to complete in duplicate
More example sentences
  • Take note that this was in duplicate, with color, too - there were some parts which had to be in red font.
  • With a changed political topography, all major public buildings - museums and opera house - were now in duplicate.
  • The Application for licensing as a Customs and Excise bonded warehouse should be made on the letterhead of the applicant in duplicate and addressed to the Commissioner for Customs and Excise.



Pronunciation: /-plikəbəl/
Example sentences
  • But when the parts are duplicable for zero cost, and when there isn't an end product, pull is the way to go.
  • By turning physical property into endlessly duplicable e-property, the ancient human problem of ‘mine-thine’ has been essentially solved.
  • And they look different too; the phenomena of light through celluloid is only duplicable to a certain degree with matrixed digital display - and further still when digital is the source.


Pronunciation: /-ˌkātiv/
Example sentences
  • I'd like the comments to be a good and readable source of answers for readers, so I've deleted some comments that were erroneous, duplicative, nonresponsive, and the like.
  • Instead, they're building sites that tend to be derivative and duplicative of their print ‘parents,’ whose product characteristics come from a dead century.
  • I think you're exactly right, this position seems, on the surface, to be already duplicative of at least two other positions here, national security adviser and the head of the CIA.


Late Middle English (in the sense 'having two corresponding parts'): from Latin duplicat- 'doubled', from the verb duplicare, from duplic- 'twofold' (see duplex).

  • two from Old English:

    An Old English word from the same source as twain, twelve, twenty, twilight, and twin (all OE), with an ancient root shared by Latin and Greek duo, source of double (Middle English), duo (late 16th century), duplicate (Late Middle English), and other words. The formula it takes two to…appeared in the 1850s in it takes two to make a quarrel, and in the 1940s in it takes two to make a bargain ( see also tango). The saying two's company, three's a crowd was originally two's company, three's none, in the 1730s. Before the British currency was decimalized in 1971 twopence or tuppence was a standard sum. To add or put in your twopenn'orth is to contribute your opinion; twopenn'orth is a contraction of twopennyworth meaning ‘an amount costing two pence’, used also for ‘a small or insignificant amount’.

Words that rhyme with duplicate

quadruplicate, quintuplicate quadruplicate

For editors and proofreaders

Syllabification: du·pli·cate

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