rest room (UK)—a room in a public building set aside for staff to take their breaks in:
- The suite consisted of the operating room, the anesthetic room, the scrub-up room and the doctors’ rest room.
rest room (U.S.)—a room in a public place, containing a toilet:
- I told them about my difficulty locating the restroom in the restaurant. They said, “You can’t say restroom or bathroom in Europe.”