- a building separate from but located near a main building or dwelling
- a small structure used for defecating or urinating, typically having a seat with a hole over a deep pit
- A small, enclosed structure having one or two holes in a seat built over a pit and serving as an outdoor toilet.
- An outbuilding, as on a farm.
The term outhouse usually refers to a permanent facility. Where an outdoor toilet is installed on a temporary basis, variants of portable toilet such as portapotty are generally used. The dated slang john and johnny house are sometimes also used to identify such toilet.