From Longman Dictionary of Contemporary Englishlavatorylav‧a‧to‧ry /ˈlævətəri $ -tɔːri/ ●○○ noun (plural lavatories) [countable] formalTOILET a toilet or the room a toilet is in
Examples from the Corpus
lavatory• The public lavatories are situated on the other side of the beach.• Even the lavatory was luxurious, with a marble interior and soft, white hand towels.Origin lavatory (1300-1400) Medieval Latin lavatorium “bowl for washing in”, from Latin lavare “to wash” 