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lavatory

lavatory /ˈlævəˌtori/ Brit /ˈlævətri/ noun
plural lavatories
lavatory
/ˈlævəˌtori/ Brit /ˈlævətri/
noun
plural lavatories
Britannica Dictionary definition of LAVATORY
[count]
formal : a room with a toilet and sink
◊ In U.S. English, lavatory is most often used for a room in an airplane.
◊ It may also be used for a room in other kinds of public places.
◊ In British English, lavatory is most often used for a room in a public place but may also be used for a room in a home.
British : toilet 1
US, technical : a bathroom sink