Examples of “duplicate” in a Sentence

adj Exactly the same as something else, especially because it was copied from it.

• He kept a duplicate key hidden under the mat.
• She sent a duplicate copy of the contract to her solicitor.
• I found a duplicate entry for my name in the database.

verb To make an exact copy of something.

• Please duplicate this form and send one copy to head office.
• Scientists tried to duplicate the results in a second experiment.
• Could you duplicate this key for me before the shop closes today?

noun An exact copy of something else.

• This ticket is a duplicate — the original is on file.
• I lost my certificate, so the office issued a duplicate.
• The artist made a duplicate of the statue for the museum shop.