lavatory
nounUK /ˈlæv.ə.tri/
US /ˈlæv.ə.tɔːr.i/
A room with a toilet and a sink where you can go to the bathroom.
She asked the teacher where the lavatory was.
OTHER MEANINGS
2. A bowl or basin used for washing, especially in religious ceremonies.
The priest washed his hands in the stone lavatory.
3. A room or building containing toilets and sinks, especially in a public place.
The lavatories at the train station were clean and well lit.
4. A fixed basin with running water for washing hands or face.
He splashed cold water on his face at the lavatory before dinner.