duplicate phoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhonetic PhoneticPhoneticPhoneticPhoneticPhoneticPhoneticphonetic verb [T] 

1. to make an exact copy of (something) 

    Parenthood is an experience nothing else can duplicate.
    We were anxious not to duplicate (=repeat) work already done.
    Can you duplicate (=use a special machine to copy) this document for me?

duplicate phoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhonetic PhoneticPhoneticPhoneticPhoneticPhoneticPhoneticphonetic adjective [before n, not gradable] 

    The thieves were equipped with duplicate keys to the safe.

duplicate phoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhonetic PhoneticPhoneticPhoneticPhoneticPhoneticPhoneticphonetic noun [C] 

    I lost the original form so they sent me a duplicate.

duplicationphoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhoneticPhonetic PhoneticPhoneticPhoneticPhoneticPhoneticPhoneticphoneticnoun [U] 

    Lack of communication between the two offices led to a wasteful duplication of effort.

This page is cited from Cambridge Dictionaries Online. For the original, please visit
http://dictionary.cambridge.org/define.asp?key=duplicate*1+0