duplicate

To make another thing that is exactly like the original.

• Can you duplicate this key?
• She duplicated the file before editing it.
• The machine duplicates documents in seconds.

Similar words: copy, reproduce

Common phrases: duplicate a file, duplicate a key, duplicate a document

To do work or an activity that has already been done.

• Please do not duplicate my work.
• Both teams duplicated the same research.
• Sharing notes helps us avoid duplicating effort.

Similar words: repeat, redo

Common phrases: duplicate work, duplicate effort, duplicate a task

To produce something as good as, or equal to, something else.

• No one could duplicate her performance.
• The team duplicated last season’s success.
• Researchers failed to duplicate the results under different conditions.

Similar words: match, equal, reproduce

Common phrases: duplicate a result, duplicate a performance, duplicate a success

Exactly the same as another thing, often because it was copied.

• We found a duplicate entry.
• Keep a duplicate key with a trusted friend.
• The system deleted duplicate files automatically.

Similar words: identical, copied

Common phrases: duplicate copy, duplicate key, duplicate entry

Using the same card deals or tile arrangements for different players so their results can be compared.

• They play duplicate bridge every week.
• Duplicate whist allows players to compare results from identical hands.
• The club organized a duplicate tournament.

Common phrases: duplicate bridge, duplicate whist, duplicate play

Another thing that is exactly like an original thing.

• I keep a duplicate of the key.
• The folder contained three duplicates.
• Is this the original document or a duplicate?

How to use it: duplicate of something (This painting is a duplicate of the original.)

Similar words: copy, replica

Opposites: original

Common phrases: a duplicate, duplicate of something, keep a duplicate