Definition of counterpart
1
: one of two corresponding copies of a legal instrument : duplicate
2a
: a thing that fits another perfectly
b
: something that completes : complement
the lead actress and her male counterpart
3a
: one remarkably similar to another
The crow is sometimes mistaken for its larger counterpart, the raven.
b
: one having the same function or characteristics as another
college presidents and their counterparts in business
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Merriam-Webster unabridged
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Time Traveler for counterpart
The first known use of counterpart was in the 15th century
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