lavatory
UK: ˈlæv.ə.tər.i | US: ˈlæv.ə.tɔːr.i
n. a room or compartment equipped with a toilet and sink for washing
n. (archaic) a vessel or fixture for washing, especially in religious rituals
The word lavatory traces back to Latin lavatorium, meaning "a place for washing." It originally referred to communal washing areas in monasteries or public baths. Over time, its meaning narrowed to focus on personal hygiene facilities, particularly toilets. The root lav- persists in modern English, linking to cleanliness (e.g., lavender, once used in washing for its scent).
The airplane’s lavatory is located at the rear of the cabin.
She excused herself to use the lavatory during the meeting.
Medieval monasteries often had a lavatory for ritual purification.
The hospital upgraded its lavatories to be more accessible.
Passengers are advised not to flush non-biodegradable items in the lavatory.