ADJ
(在大城市工作者居住的)邻镇住宅区的，郊外住宅区的
If you refer to a place as a dormitory suburb or town, you mean that most of the people who live there travel to work in another, larger town a short distance away.
例句
It had become almost a dormitory suburb of the city.
它几乎成为了城市的一个市郊住宅区。