dual criminality principleglossary / DUAL-CRIMINALITY PRINCIPLE dual-criminality principle. The rule prohibiting the international extradition of a fugitive unless the offense involves conduct that is criminal in both countries. [Cases: Extradition and Detainers 5.] 词条贡献者 双语律师Denise,知名法学院国际私法专业,擅长翻译各类与国际争议解决相关的法律文件。