/ˌʌpˈsteəz ||; ˈʌpˈstɛrz/adv to or on a higher floor of a building 往楼上；在楼上: to go upstairs 走上楼She's sleeping upstairs. 她在楼上睡觉。 [OPP] downstairs 反义词为downstairsupstairs /ˈʌpsteəz ||; ˈʌpˈstɛrz/ adj an upstairs window 楼上的窗户 the upstairs noun [sing] (informal 非正式) We're going to paint the upstairs. 我们正要把楼层油漆。