duplication

noun

du·​pli·​ca·​tion ˌdü-pli-ˈkā-shən 

 also  ˌdyü-

1

a

: the act or process of duplicating

b

: the quality or state of being duplicated

2

: duplicate, counterpart

3

: a part of a chromosome in which the genetic material is repeated

also : the process of forming a duplication

Synonyms

• image
• twin
• duplicate
• replica
• clone
• picture
• portrait

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

Layoffs to remove duplication suppress local demand. —Katica Roy, Fortune, 15 Oct. 2025

These secondary variants took many forms, including both small changes and large deletions, duplications and expansions of their DNA. —Santhosh Girirajan, The Conversation, 7 Oct. 2025

Schlemmer recommends not posting anything that contains a recording of your voice, as even a short snippet can be used for duplication. —Suzi Morales, Parents, 25 Sep. 2025

Also, folks in the know say an internal study showed that there is only around 4% duplication in viewership between NBC and Peacock audiences. —Michael Schneider, Variety, 18 Sep. 2025

Word History

First Known Use

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

Rhymes for duplication

• abdication
• aberration
• abjuration
• abnegation
• abrogation
• acceptation
• acclamation
• acclimation
• accusation
• activation
• actuation
• acylation

Kids Definition

duplication

noun

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

1

a

: an act or process of duplicating

b

: the state of being duplicated

2

: duplicate entry 3

Medical Definition

duplication

noun

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

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

Legal Definition

duplication

noun

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

: the act, process, or result of duplicating