dormitory

Short definition from Wiktionary

Noun

1. 1
   A room containing a number of beds (and often some other furniture and/or utilities) for sleeping, often applied to student and backpacker accommodation of this kind.
2. 2
   A building or part of a building which houses students, soldiers, monks etc. who sleep there and use communal further facilities.
3. 3
   A dormitory town.