Noah Webster's Dictionary 1. (n.) One of two parts that complete each other; anything which answers, or corresponds, to another; a copy; a duplicate; a facsimile. 2. (n.) One of two corresponding copies of an instrument; a duplicate. 3. (n.) A person who closely resembles another. 4. (n.) 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.

Multi-Version Concordance Counterpart (2 Occurrences) Genesis 2:18 And Jehovah God saith, 'Not good for the man to be alone, I do make to him an helper -- as his counterpart.' (YLT) Genesis 2:20 And the man calleth names to all the cattle, and to fowl of the heavens, and to every beast of the field; and to man hath not been found an helper -- as his counterpart. (YLT)