scienter actionglossary / SCIENTER ACTION scienter action. A lawsuit in which the plaintiff must prove that the defendant acted knowingly or knew of the danger — e.g., at common law an action for damage caused by a domestic animal. See SCIENTER. 词条贡献者 译者Peter,毕业于亚洲顶尖的高级翻译学院,擅长翻译各种与复杂金融产品相关的法律文件。