In cinema, a room with blue (or occasionally green) walls in which effects shots are filmed. / (aviation, slang) The toilet/washroom on a passenger aircraft.

A sauna; a hot room that is filled with steam in which people sit for health reasons.

A room in a library set aside for the storage and use of maps.

A room in a school or business set aside for the copy machines.

(film) A room in which a film is edited to its final form.

A room in a building that houses the boiler(s) and similar equipment. / A compartment on a steamship that houses the boiler. / (informal) A telemarketing firm that makes cold calls.

A room in a building, such as an office building, set aside for the use of people to hold meetings.

A room in a home set aside for sewing.

A room used to grow plants. / A room used to house large machinery (plant), such as air-conditioning equipment.

A room in a home or hotel set aside for the use of visiting guests.