failure of proof defenseglossary / FAILURE-OF-PROOF DEFENSE failure-of-proof defense. The defense that a party’s proof does not establish a fact essential to a claim or defense. 词条贡献者 译者Scott,毕业于一所旨在培养高级翻译专业人才的翻译院校,擅长翻译各种与环境诉讼相关的法律文件。