nonmutual collateral estoppelglossary / nonmutual collateral estoppel Estoppel asserted either offensively or defensively by a nonparty to an earlier action to prevent a party to that earlier action from relitigating an issue determined against it. 词条贡献者 双语律师李黎,国际知名法学院法律专业,擅长翻译各类与消费者金融诉讼相关的法律文件。