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Akira,毕业于一所旨在培养高级翻译专业人才的翻译院校,专注翻译各类与能源行业争议有关的法律文件。