efficiency apartment (noun)

1. In the science fiction novel, the protagonist lived in an efficiency apartment on Mars while conducting his research.

2. During the Great Depression, many people resorted to living in small efficiency apartments due to financial constraints.

3. In the animated sitcom, the main character resides in a colorful efficiency apartment in the heart of the bustling city.

4. The teachings of Buddhism emphasize simplicity and frugality, encouraging followers to live in efficiency apartments to avoid unnecessary attachment to material possessions.