duplicate
verb [ T ]
uk/ˈdjuːplɪkeɪt/ us/ˈduːplɪkeɪt/to make an exact copy of something:
There's a machine that can duplicate nine DVDs at a time.
to do something again that has already been done, when this is unnecessary:
Some of the proposed laws duplicate those already adopted by the federal government.
to make something happen again in the same way as it happened before:
easy/difficult/impossible to duplicate Their past success might be hard to duplicate.
Compare
copy verb
duplicate
adjective [ before noun ]
uk/ˈdjuːplɪkət/ us/ˈduːplɪkɪt/made as an exact copy of something:
duplicate copy/file/record We will not be able to return the documents, so keep a duplicate copy.
duplicate invoice/statement/receipt
done or made for a second time, especially when this is not necessary, or in order to deceive:
duplicate payment/claim Internal controls are not in place to provide for the prevention of duplicate payments.
Dishonest people filed duplicate claims or received rental assistance while living in government-paid housing.
duplicate
noun
uk/ˈdjuːplɪkət/ us/ˈduːplɪkɪt/ [ C ]
an exact copy of something:
I have lost the document and my boss says she cannot provide a duplicate.
a duplicate of sth Ask the bank to send you a duplicate of the bank statement each month.
create/make/produce a duplicate
Compare
copy noun
in duplicate
if a document is in duplicate, two copies of it are made:
The government requires that all bank records be kept in duplicate.
Compare
triplicate