great diligenceglossary / great diligence The diligence that a very prudent person exercises in handling his or her own property like that at issue. — Also termed high diligence. 词条贡献者 译者Susanne,世界顶尖法学院国际税法专业,擅长翻译各种与联邦税务纠纷相关的法律文件。