A lavatory is a room or fixture containing a toilet and typically other facilities such as a sink, mirror, and soap dispenser. It may also refer to a public restroom located in a facility like an airport, train station, or restaurant.
Usage examples
I couldn't find a public lavatory anywhere in the park, so I had to wait till I got home.
The flight attendant directed passengers to the lavatory located at the back of the plane.
Please make sure to keep the lavatory clean and tidy for the next person to use.
The hotel room had a spacious en-suite lavatory with all modern amenities.
It is essential to wash your hands thoroughly after using the lavatory to maintain good hygiene.
Chris flew to Germany and France on Lufthansa this week — and was eager to check out the unusual staircase down to a bank of lavatories in the belly of the A340 flying SFO - MUC. (travelskills.com)
Premium economy class passengers share the same lavatories with economy class passengers. (travelcodex.com)
Most Creative: «15th - Century Flemish - Style Portraits Recreated in Airplane Lavatory» and «Dad Takes Crazy Photos of Daughters» (rachelheldevans.com)