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 of duplication

• 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

Dogra has designed a new organizational structure, aimed at reducing management layers, removing duplication and simplifying decision-making. — Jake Kanter, Deadline, 9 Sep. 2026

Each of us likely differs from it at millions of bases in our genome, and most of us probably carry some combinations of insertions, deletions, duplications, and flipped sequences. — John Timmer, ArsTechnica, 9 Sep. 2026

In duplication or mirror mode, the machine prints up to four identical parts simultaneously, effectively quadrupling batch output without needing to ramp up raw print speed. — New Atlas, 5 Sep. 2026

Biologists hotly debate whether the significant evolutionary changes that led to jawed vertebrates, from hagfish to humans, are connected by ancient gene duplications hundreds of millions of years ago. — Carrie Arnold contributing, Quanta Magazine, 2 Sep. 2026

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