宿舍 (sù shè) is a noun meaning 'dormitory' — shared living quarters for students or workers, typically on a school or company campus. It is more specific than 屋子 (wū zi, any room/house) and refers to the whole building or unit, not just a bed (床位). 寝室 (qǐn shì) is a near-synonym but emphasizes the sleeping room within a dormitory.