bathroom
/ˈbæɵˌruːm/ /Brit ˈbɑːɵˌruːm/
noun
plural -rooms
[count] a room with a sink and toilet and usually a bathtub or shower
In U.S. English, a bathroom is mainly thought of as a room with a toilet. In British English, a bathroom is mainly thought of as a room with a bathtub or shower.
US :a room in a public place with a toilet and sink
go to the bathroom
or use the bathroom
US :to use the toilet