third party defendantglossary / THIRD-PARTY DEFENDANT third-party defendant. A party brought into a lawsuit by the original defendant. [Cases: Federal Civil Procedure 281; Parties 49. C.J.S. Parties § 127.] 词条贡献者 资深译员Michael,国内知名法学院法律翻译专业,擅长翻译各类与劳动诉讼相关的法律文件。