n.
Pronunciation: -k ə t
Function: noun
Date: 1532
1 a : either of two things exactly alike and usually produced at the same time or by the same process b : an additional copy of something (as a book or stamp) already in a collection
2 : one that resembles or corresponds to another : COUNTERPART
3 : two identical copies ― used in the phrase in duplicate
synonyms see REPRODUCTION