Main Entry: coun·ter·part

Pronunciation: \-ˌpärt\

Function: noun

Date: 15th century

1 : one of two corresponding copies of a legal instrument : duplicate
2 a : a thing that fits another perfectly b : something that completes : complement
3 a : one remarkably similar to another b : one having the same function or characteristics as another <college presidents and their counterparts in business>