du·​pli·​ca·​tion | \ˌdü-pli-ˈkā-shən also ˌdyü- \

Definition of duplication 

1a : the act or process of duplicating

b : the quality or state of being duplicated

3 : a part of a chromosome in which the genetic material is repeated also : the process of forming a duplication

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Examples of duplication in a Sentence

He sent the manuscript out for duplication. Please eliminate duplication when combining the lists.

Recent Examples on the Web

The only duplication is clerks and managers, the administrative crossovers. Author: Naomi Klouda, Anchorage Daily News, "Kodiak governments latest to explore savings of consolidation," 6 Apr. 2018 Charlson said elections officials culled 317 that were duplications because a voter had made more than one change while the glitch went undetected, reducing the number to 83,176. Michael Dresser, baltimoresun.com, "Maryland elections board and MVA agree on number of voters whose information wasn't transferred on time: 83,493," 6 July 2018 And his lawyers said Congress has dramatically expanded the number and scope of federal laws in recent years, creating more duplications with state laws, a problem the earlier Supreme Court decisions never envisioned. NBC News, "Supreme Court agrees to take up double jeopardy issue," 28 June 2018 Stefanski settles into the experienced hand role in the front office, so there could be duplication if Bower, who has 20-plus years of NBA experience, is retained. Vince Ellis, Detroit Free Press, "Could Tayshaun Prince emerge in new Detroit Pistons front office?," 27 May 2018 What might look like a non-event is in fact an attempt to avoid a duplication of effort. The Economist, "The Trump administration plans to crack down on Chinese investment," 28 June 2018 But the new Watson Health team, with headquarters in Cambridge, Mass., started promoting another cloud, creating what seemed to be duplication — even competition — between old and new guards. Casey Ross, STAT, "IBM Watson Health hampered by internal rivalries and disorganization, former employees say," 14 June 2018 William observes that there seems to be some barrier—something about the mind that resists duplication. Sandra Upson, WIRED, "Westworld Recap, Season 2 Episode 8: The Great Ghost Nation Mystery," 11 June 2018 The purpose of the sale is simple: Consolidate services and streamline operations to spare ratepayers the increases forced by duplication and inefficiencies. Anchorage Daily News, "Proposed ML&P sale makes sense for Anchorage," 14 Jan. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'duplication.' 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 duplication

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

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

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English Language Learners Definition of duplication

: the act or process of copying something

: the state of containing copies of something or being a copy of something


du·​pli·​ca·​tion | \ˌdü-pli-ˈkā-shən, ˌdyü-\

Kids Definition of duplication

1 : the act or process of copying He sent the paper out for duplication.

2 : the state of being copied Make sure there's no duplication on the invitation list.


du·​pli·​ca·​tion | \ˌd(y)ü-pli-ˈkā-shən \

Medical Definition of duplication 

1 : the act or process of duplicating : the quality or state of being duplicated

2 : a part of a chromosome in which the genetic material is repeated also : the process of forming a duplication

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du·​pli·​ca·​tion | \ˌdü-pli-ˈkā-shən, ˌdyü- \

Legal Definition of duplication 

: the act, process, or result of duplicating

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by force of circumstances

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