bath·room 
/ˈbæθˌru:m, Brit ˈbɑ:θˌru:m/ noun
plural bath·rooms /ˈbæθˌru:m, Brit ˈbɑ:θˌru:m/ noun [count] 1 : a room with a sink and toilet and usually a bathtub or shower
▪ Their house has three bathrooms. ◊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. 2 US : a room in a public place with a toilet and sink
▪ The restaurant has only one bathroom. ▪ a public bathroom [=restroom, lavatory]
▪ Their house has three bathrooms. ◊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.
▪ The restaurant has only one bathroom. ▪ a public bathroom [=restroom, lavatory]
go to the bathroom or use the bathroom
US : to use the toilet
▪ The little boy told his mother that he had to go to the bathroom. ▪ You should use the bathroom before we leave.
▪ The little boy told his mother that he had to go to the bathroom. ▪ You should use the bathroom before we leave.
