| Counterpart 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. Thesaurus Entries ally, alter ego, analogon, analogue, associate, brother, clone, close copy, close match, coequal, cognate, companion, compeer, complement, congenator, congener, coordinate, correlate, correlative, correspondent, ditto, double, dupe, duplicate, duplication, each other, equal, equipollent, equivalent, facsimile, fellow, image, kindred spirit, like, likeness, match, mate, model, near duplicate, obverse, one another, opposite number, parallel, peer, pendant, picture, quadruplicate, reciprocal, reciprocatist, reciprocator, repetition, replica, replication, representation, reproduction, rival, second self, similitude, simulacrum, sister, soul mate, such, suchlike, tally, the like of, the likes of, triplicate, twin, vis-a-vis |