ˈrest room noun [countable]
American English a room with a toilet in a place such as a restaurant or cinema Synonym : toilet British English

[TahlilGaran] Dictionary of Contemporary English ▲

rest room
n. A room or series of rooms in a public building which has things for personal comfort and grooming, such as toilets, washbowls, mirrors, and often chairs or couches.
Sally went to the rest room to powder her nose.
Compare: POWDER ROOM.

[TahlilGaran] English Idioms Dictionary ▲