impostglossary / IMPOST impost (im-pohst). A tax or duty, esp. a customs duty (the impost was assessed when the ship reached the mainland). See DUTY(4). 词条贡献者 译者张文,国际知名商学院金融专业,擅长翻译各种与结构性融资及衍生品诉讼相关的法律文件。