copartyglossary / COPARTY coparty. A litigant or participant in a legal transaction who has a like status with another party; a party on the same side of a lawsuit. — Also termed joint party. See CODEFENDANT; COPLAINTIFF. 词条贡献者 资深译员Lynn,知名国际商学院金融专业,专注翻译各种与贷款人责任及其他银行业与金融机构诉讼有关的法律文件。