duplication
nounUK /ˌdjuːplɪˈkeɪʃn/
US /ˌduːplɪˈkeɪʃn/
A duplication is a copy of something, or the act of making a copy.
The duplication of the key meant we both had one.
RELATED WORDS
OTHER MEANINGS
2. The state of being doubled or made twice as large.
The duplication of effort wasted everyone's time.
3. In biology, a repeated section of DNA or a chromosome.
The genetic duplication caused the unusual trait.
4. The process of doing something again that has already been done.
Avoid duplication of work by sharing the files.