Longman Dictionary of Contemporary English homepage

duplicate

1 verb
     
du‧pli‧cate1 [transitive]
1 to copy something exactly:
New copies of the form can be duplicated from a master copy.
The video was duplicated illegally.
2 to repeat something in exactly the same way:
We don't want staff to duplicate each other's work.
—duplication noun [uncountable]
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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