• (n.) The state of being a copartner or of having a joint interest in any matter. • (n.) A partnership or firm; as, A. and B. have this day formed a copartnership. Found on http://thinkexist.com/dictionary/meaning/copartnership/
Co·part'ner·ship noun 1. The state of being a copartner or of having a joint interest in any matter. 2. A partnership or firm; as, A. and B. have this day formed a copartnership . Found on http://www.encyclo.co.uk/webster/C/156