penthouse
noun [ C ] uk/ˈpent.haʊs/ us/ˈpent.haʊs/
(豪华的)顶层公寓,屋顶房间
an expensive apartment or set of rooms at the top of a hotel or tall building
The singer is staying in a penthouse suite (= set of rooms) in the Hilton. 那位歌手住在希尔顿酒店的一套顶层客房里。