efficiency apartment
Synonym discussion
Sense: noun/1
An efficiency apartment is the most compact of these options: one single room combines living, sleeping, and cooking, with only the bathroom separate. A studio apartment is similar but usually larger, sometimes with a partial wall or alcove marking off the sleeping area, and typically has a more complete kitchen with a full-sized stove and refrigerator. A bedsit (short for 'bed-sitting room') is the British equivalent, common in converted houses where tenants share a bathroom. Both 'studio apartment' and 'studio flat' refer to the same thing, though 'flat' is more common in British English.
Etymology
The term appeared in American English around 1930, combining 'efficiency' (referring to the space-saving, multi-purpose design) with 'apartment'. It reflects early 20th-century urban housing trends that made compact living spaces desirable for single workers and students.
First known use
1930
1930, in the meaning defined above