1. adjective /ˈdjuː.plɪ.kət,ˈdjuː.plɪˌkeɪt/
being the same as another; identical. This may exclude the first identical item in a series, but usage is inconsistent.
This is a duplicate entry.
2. verb /ˈdjuː.plɪ.kət,ˈdjuː.plɪˌkeɪt/
a) to make a copy of
If we duplicate the information, are we really accomplishing much?
You dont need to duplicate my efforts.
3. noun /ˈdjuː.plɪ.kət,ˈdjuː.plɪˌkeɪt/
This is a duplicate, but a very good replica.
Wikipedia foundation.