duplicate

adjective
du·​pli·​cate | \ ˈdü-pli-kət How to pronounce duplicate (audio) also ˈdyü-\

Definition of duplicate

 (Entry 1 of 3)

1 : consisting of or existing in two corresponding or identical parts or examples duplicate invoices
2 : being the same as another duplicate copies

duplicate

verb
du·​pli·​cate | \ ˈdü-pli-ˌkāt How to pronounce duplicate (audio) also ˈdyü-\
duplicated; duplicating

Definition of duplicate (Entry 2 of 3)

transitive verb

1 : to make double or twofold
2a : to make a copy of a cell duplicates itself when it divides
b : to produce something equal to trying to duplicate last year's success
c : to do over or again often needlessly duplicated effort

intransitive verb

: to become duplicated also : repeat

duplicate

noun
du·​pli·​cate | \ ˈdü-pli-kət How to pronounce duplicate (audio) also ˈdyü-\

Definition of duplicate (Entry 3 of 3)

1a : either of two things exactly alike and usually produced at the same time or by the same process
b : an additional copy of something (such as a book or stamp) already in a collection
2 : one that resembles or corresponds to another : counterpart
3 : two identical copies used in the phrase in duplicate

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Other Words from duplicate

Verb

duplicative \ ˈdü-​pli-​ˌkā-​tiv How to pronounce duplicative (audio) also  ˈdyü-​ \ adjective

Choose the Right Synonym for duplicate

Noun

reproduction, duplicate, copy, facsimile, replica mean a thing made to closely resemble another. reproduction implies an exact or close imitation of an existing thing. reproductions from the museum's furniture collection duplicate implies a double or counterpart exactly corresponding to another thing. a duplicate of a house key copy applies especially to one of a number of things reproduced mechanically. printed 1000 copies of the lithograph facsimile suggests a close reproduction often of graphic matter that may differ in scale. a facsimile of a rare book replica implies the exact reproduction of a particular item in all details a replica of the Mayflower but not always in the same scale. miniature replicas of classic cars

Examples of duplicate in a Sentence

Adjective

I began receiving duplicate copies of the magazine every month. I had a duplicate key made.

Verb

She duplicated the video to give to family and friends. Unfortunately, the results of the first study could not be duplicated.

Noun

In case you lose your keys, keep a set of duplicates somewhere safe. doll carriages that are duplicates of baby carriages
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Recent Examples on the Web: Adjective

The displays aren't the only part of the Nubia X that use duplicate components: there are also two fingerprint readers. Ron Amadeo, Ars Technica, "ZTE smartphone goes to extremes to kill the notch, adds rear secondary display," 1 Nov. 2018 Police returned the hat to Richard following the arrest, but the teen also received a duplicate hat -- autographed by President Trump. Stephen Sorace, Fox News, "Man accused of stealing teen's MAGA hat indicted by grand jury," 31 Aug. 2018 Other Twitter users, desperate for validation, endlessly retweet their own tweets, spamming followers with duplicate information. Casey Newton, The Verge, "Why social media is friend to far-right politicians around the world," 30 Oct. 2018 The whole software package is built for one purpose, without duplicate app selections serving different masters. Ron Amadeo, Ars Technica, "Pixel 3 XL review—Google software deserves better than this hardware," 15 Oct. 2018 Facebook's justification for removing problematic accounts—using duplicate profiles, artificially boosting metrics, inflaming political tension to fatten ad revenue—is a tactful one. Sam Blum, Popular Mechanics, "Facebook's Fake News Problem Isn't Russian Anymore—It's Homegrown," 12 Oct. 2018 Her campaign also submitted three duplicate signatures. Daniel Bice, Milwaukee Journal Sentinel, "Watertown police investigate allegations candidate forged signatures on nomination papers," 5 June 2018 The earlier issue with duplicate transactions has been resolved. Jordan Cutler-tietjen, sacbee, "Wells Fargo apologizes after customers see double charges and transaction problems," 16 June 2018 That estimate does not include duplicate accounts, which users sometimes create by accident or to have separate professional and personal profiles. The Washington Post, OregonLive.com, "Facebook's crackdown on fake accounts isn't working for everyone," 5 May 2018

Recent Examples on the Web: Verb

These companies duplicate one another’s efforts, said the report, while using their large financial clout to gain insurmountable leads over would-be rivals. James Vincent, The Verge, "Google, Apple, and Uber must share mapping data with rivals, says UK data group," 20 Nov. 2018 An, a 5-11, 256-pound lineman, wants to duplicate Martz’s work ethic and tenacity. Jayda Evans, The Seattle Times, "A battle for respect, then in the trenches: For Newport’s Jenna Martz, football is feminism," 26 Oct. 2018 But the candidates themselves created a race that may not be easily duplicated around the country. Eliza Collins, USA TODAY, "Conor Lamb holds razor-thin lead over Rick Saccone in closely watched Pennsylvania race," 14 Mar. 2018 What Auburn did to bottle up Chubb and Michel in its 40-17 rout Nov. 11 at home isn't likely to be duplicated. Charles Hollis, AL.com, "Maybe this isn't Saban's best Alabama team, but it still may get the best of Georgia," 7 Jan. 2018 Her face, complete with blunt, Germanic bangs, is briefly duplicated on a giant screen like an evangelical preacher’s. Jacqueline Detwiler, Popular Mechanics, "The Heroes of Science Who Are Unlocking the Brain," 3 Oct. 2018 Anyway, Oculus Quest duplicates the more rigid straps of the Rift proper, which is a huge improvement over Go’s flimsy elastic. Hayden Dingman, PCWorld, "The $399 Oculus Quest is a premium VR headset with no wires—and no PC required," 26 Sep. 2018 But certain things simply can’t or shouldn’t be duplicated. Steven Stolman, Town & Country, "A Clear-Eyed Assessment of the New Four Seasons—By Someone Who Loved the Old One," 7 Sep. 2018 Closer to home, the USMNT can duplicate the blue print of their dynamic female counterparts, the reigning champions and three-time women’s World Cup winners. Christopher L. Gasper, BostonGlobe.com, "The Lions in the Super Bowl, a .400 hitter in a season, and other sports dreams I’d like to see become reality," 14 July 2018

Recent Examples on the Web: Noun

Democrats say this won’t result in voter fraud, but automatic registration will inevitably register thousands who aren’t eligible or produce duplicate registrations based on faulty government data. The Editorial Board, WSJ, "Majority Preservation Act," 7 Jan. 2019 Amazon says that this could help people avoid requesting the same item on different lists and ending up receiving duplicate gifts. Shannon Liao, The Verge, "Anyone with an Amazon account can now make a collaborative wish list," 24 Aug. 2018 The list contains several entries that may be duplicates with different spellings. Janie Har, The Seattle Times, "AP Explains: The hunt for missing, dead in California fire," 21 Nov. 2018 This would reduce duplicate registrations and help clean up voter rolls. Madeline Marshall, Vox, "Why America needs automatic voter registration," 7 Nov. 2018 Additionally, the company plans to integrate the use of machine-learning tools to identify duplicates of debunked stories that continue to pop up on the platform. James Hohmann, Washington Post, "The Daily 202: Under Trump, Americans are becoming more supportive of immigration," 22 June 2018 Facebook will also use machine-learning tools to identify duplicates of debunked stories that continue to pop up on the network. BostonGlobe.com, "Saddleback Mountain buyer accused of bilking investor," 21 June 2018 Rather, someone without the proper credentials was able to access the Marriott reservation database to make a duplicate encrypted copy of customer information, which was then presumably taken outside the system. Michael Simon, PCWorld, "Marriott Starwood hotel data breach FAQ: What 500 million hacked guests need to know," 30 Nov. 2018 Prosecutors said between May 2014 and April 2015, the three culprits stole patron’s card information and created duplicates to rake in more than $420,000. Bradford Betz, Fox News, "Key witness in casino fraud case found dead in creek," 13 Sep. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'duplicate.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of duplicate

Adjective

15th century, in the meaning defined at sense 1

Verb

15th century, in the meaning defined at transitive sense 1

Noun

1532, in the meaning defined at sense 1a

History and Etymology for duplicate

Adjective

Middle English, from Latin duplicatus, past participle of duplicare to double, from duplic-, duplex

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Last Updated

28 Feb 2019

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Time Traveler for duplicate

The first known use of duplicate was in the 15th century

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More Definitions for duplicate

duplicate

adjective

English Language Learners Definition of duplicate

 (Entry 1 of 3)

: exactly the same as something else : made as an exact copy of something else

duplicate

verb

English Language Learners Definition of duplicate (Entry 2 of 3)

: to make an exact copy of (something)
: to produce (something) in another form

duplicate

noun

English Language Learners Definition of duplicate (Entry 3 of 3)

: something that is exactly the same as something else : an exact copy of something else

duplicate

adjective
du·​pli·​cate | \ ˈdü-pli-kət How to pronounce duplicate (audio) , ˈdyü-\

Kids Definition of duplicate

 (Entry 1 of 3)

: exactly the same as another duplicate copies

duplicate

verb
du·​pli·​cate | \ ˈdü-pli-ˌkāt How to pronounce duplicate (audio) , ˈdyü-\
duplicated; duplicating

Kids Definition of duplicate (Entry 2 of 3)

: to make an exact copy of

duplicate

noun
du·​pli·​cate | \ ˈdü-pli-kət How to pronounce duplicate (audio) , ˈdyü-\

Kids Definition of duplicate (Entry 3 of 3)

: a thing that is exactly like another

duplicate

intransitive verb
du·​pli·​cate | \ ˈd(y)ü-pli-ˌkāt How to pronounce duplicate (audio) \
duplicated; duplicating

Medical Definition of duplicate

: to become duplicate : replicate DNA in chromosomes duplicates

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duplicate

transitive verb
du·​pli·​cate | \ ˈdü-pli-ˌkāt, ˈdyü- How to pronounce duplicate (audio) \
duplicated; duplicating

Legal Definition of duplicate

 (Entry 1 of 2)

: to make a duplicate of

Other Words from duplicate

duplicative \ -​ˌkā-​tiv How to pronounce duplicative (audio) \ adjective

duplicate

noun
du·​pli·​cate | \ ˈdü-pli-kət, ˈdyü- How to pronounce duplicate (audio) \

Legal Definition of duplicate (Entry 2 of 2)

: either of two things exactly alike and often produced at the same time specifically : a counterpart identified in the Federal Rules of Evidence Rule 1001 as produced by the same impression as the original or from the same matrix or by means of photography, mechanical, or electronic rerecording, chemical reproduction, or another technique which accurately reproduces the original — compare original

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