duplicate

1 of 3

adjective

du·​pli·​cate ˈdü-pli-kət How to pronounce duplicate (audio)
 also  ˈdyü-
1
: consisting of or existing in two corresponding or identical parts or examples
duplicate invoices
2
: being the same as another
duplicate copies

duplicate

2 of 3

verb

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

transitive verb

1
: to make double or twofold
2
a
: 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
duplicative
ˈdü-pli-ˌkā-tiv How to pronounce duplicate (audio)
 also  ˈdyü-
adjective

duplicate

3 of 3

noun

du·​pli·​cate ˈdü-pli-kət How to pronounce duplicate (audio)
 also  ˈdyü-
1
a
: 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
Choose the Right Synonym for duplicate

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
Recent Examples on the Web
Adjective
Abbott said the layoffs were for duplicate positions in the marketing and administrative departments, which existed between both companies. Brayden Garcia, Fort Worth Star-Telegram, 13 July 2024 The Mount Rushmore State's secretary of state is to share information from the statewide voter registration file with any other state, territory, or local subdivision of a state or territory to identify duplicate registrations. Victor Hagan, USA TODAY, 13 May 2024
Verb
Lab and animal studies have shown positive results regarding the effect of NADH on physical performance and recovery, but these results have yet to be duplicated in human trials. Brittany Lubeck, Ms, Rdn, Verywell Health, 11 July 2024 The Lamont administration also tried unsuccessfully to convince legislators two years ago to strip the board’s enforcement powers, arguing that the contracting standards board largely duplicates watchdog efforts already performed by other agencies such as the state auditors of public accounts. Andrew Brown, Hartford Courant, 9 July 2024
Noun
But if a three-letter code is already taken by another airport — there can be no duplicates — IATA moves on to the next best option. Stefanie Waldek, Travel + Leisure, 29 June 2024 This program includes the systematic submittals of standards, duplicates, and blank samples into the flow of samples produced by the sampling. Charlotte Observer, 20 June 2024 See all Example Sentences for duplicate 

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'duplicate.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

Etymology

Adjective

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

First Known Use

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

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

Dictionary Entries Near duplicate

Cite this Entry

“Duplicate.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/duplicate. Accessed 25 Jul. 2024.

Kids Definition

duplicate

1 of 3 adjective
du·​pli·​cate ˈd(y)ü-pli-kət How to pronounce duplicate (audio)
1
: having two parts exactly the same or alike
2
: being the same as another

duplicate

2 of 3 verb
du·​pli·​cate ˈd(y)ü-pli-ˌkāt How to pronounce duplicate (audio)
duplicated; duplicating
1
: to make double
2
: to make a duplicate of
duplicative adjective

duplicate

3 of 3 noun
ˈd(y)ü-pli-kət
: a thing that is exactly like another

Medical Definition

duplicate

intransitive verb
du·​pli·​cate ˈd(y)ü-pli-ˌkāt How to pronounce duplicate (audio)
duplicated; duplicating
: to become duplicate : replicate
DNA in chromosomes duplicates

Legal Definition

duplicate

1 of 2 transitive verb
du·​pli·​cate ˈdü-pli-ˌkāt, ˈdyü- How to pronounce duplicate (audio)
duplicated; duplicating
: to make a duplicate of
duplicative adjective

duplicate

2 of 2 noun
du·​pli·​cate ˈdü-pli-kət, ˈdyü- How to pronounce duplicate (audio)
: 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

More from Merriam-Webster on duplicate

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