dor·mi·to·ry 
(dôrmĭ-tôr′ē)
(dôrmĭ-tôr′ē)n. pl. dor·mi·to·ries
1. A building for housing a number of persons, as at a school or resort.
2. A room providing sleeping quarters for a number of persons.
3. A community whose inhabitants commute to a nearby city for employment and recreation.
[Middle English dormitorie, from Latin dormītōrium, from dormītōrius, of sleep, from dormītus, past participle of dormīre, to sleep.]