Definition of "common room"

common room

noun
plural common rooms
1. (UK, Australia, Canada, New Zealand) A shared lounge found in dormitories, universities, military bases, etc.
  Quotations
  He was […] none of your free-and-easy companions, who would scrape their boots upon the fire-dogs in the common room, and be not at all particular on the subject of spittoons; […]
  1841 February–November, Charles Dickens, “Barnaby Rudge”, in Master Humphrey’s Clock, volume II, London: Chapman & Hall, […], chapter 10, page 289
  Any expected permanent way checks are indicated daily on a map in the enginemen's common room.
  1950 June, N. H. Bousfield, “Angers, a French Provincial Railway Centre”, in Railway Magazine, page 371