Definition of family room noun from the Oxford Advanced Learner's Dictionary

  1. 1(North American English) a room in a house where the family can relax, watch television, etc. See related entries: Rooms in a house
  2. 2a room in a hotel for three or four people to sleep in, especially parents and children See related entries: Staying in a hotel
  3. 3(in Britain) a room in a pub where children are allowed to sit
See the Oxford Advanced American Dictionary entry: family room