portmanteau/pɔ:tˈmæntəu; pɔrt`mænto/ n(pl ~s or -teaux / -təuz; -toz/) (dated 旧) large oblong (usu leather) case for clothes that opens on a hinge into two equal parts 旅行衣箱（通常为皮制, 以合叶联接相同的两部分）.
牛津英汉双解词典