A part corresponding to another part; anything which answers, or corresponds, to another; a copy; a duplicate; a facsimile.
One of two corresponding copies of an instrument; a duplicate.
A person who closely resembles another.
A thing may be applied to another thing so as to fit perfectly, as a seal to its impression; hence, a thing which is adapted to another thing, or which supplements it; that which serves to complete or complement anything; hence, a person or thing having qualities lacking in another; an opposite.
When you do a thing with your whole soul and everything that is noble within you, you always find your counterpart. Camille Pissarro
The counterpart of the suicide is the seeker; but the difference between them is slight. Paul Watzlawick
I spend a lot of time working by myself developing songs, but I really need some other counterpart to help me pull it all together, because you go nuts working if I had to finish an entire project all within my own head. Andrew Bird
This most dangerous enemy is the American counterpart of the British Fabian Socialist, who denies that he is a Socialist and operates behind a mask which he calls National Planning. John T. Flynn