plaintiffglossary / PLAINTIFF plaintiff. The party who brings a civil suit in a court of law. — Abbr. pltf. Cf. DEFENDANT.use plaintiff. See USE PLAINTIFF. 词条贡献者 双语律师郭敏,国际知名商学院金融专业,擅长翻译各类与金融衍生品与结构化产品相关的法律文件。