rest room
or rest·room
noun
rooms or a room having a washbowl, toilet, and other facilities for use by employees, visitors, etc., as in a store, theater, or office.
Origin of rest room
An Americanism dating back to 1895–1900
Words nearby rest room
rest cure,
rest energy,
rest home,
rest mass,
rest on one's laurels,
rest room,
rest stop,
rest-cure,
rest-home,
restage,
restart
Example sentences from the Web for restroom
British Dictionary definitions for restroom
rest room
noun
a room in a public building having lavatories, washing facilities, and sometimes couches