express agencyglossary / express agency An actual agency arising from the principal’s written or oral authorization of a person to act as the principal’s agent. Cf. implied agency. [Cases: Principal and Agent 96. C.J.S. Agency §§ 148–149.] 词条贡献者 双语律师蓉婧,国内知名法学院民商法专业,擅长翻译各类与数据隐私及安全相关的法律文件。