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 法律翻译Cathy,在一家英国银圈所担任专职法律翻译,擅长翻译有关城市基础设施领域的法律文件。