prefabricated unit
nounUK /ˌpriːˈfæbrɪkeɪtɪd ˈjuːnɪt/
US /ˌpriːˈfæbrɪkeɪtɪd ˈjuːnɪt/
A prefabricated unit is a part of a building that is made in a factory and then put together on the building site.
The school bought a prefabricated unit to use as a new classroom.
OTHER MEANINGS
2. A self-contained section of a larger machine or system that is built separately and then fitted into place.
Engineers replaced the prefabricated unit in the cooling system within an hour.
3. A standard piece of furniture or equipment that comes already assembled and ready to use.
The office ordered prefabricated units for the new workstations.
4. A small, often temporary, structure such as a shed or portable classroom delivered as a complete unit.
Workers set up a prefabricated unit at the back of the playground.