backhouse (plural backhouses)
- (now dialect) An outbuilding behind the main building.
- (US and Canada, euphemistic) An outhouse: an outbuilding used as a lavatory.
1939, Christopher Morley, chapter II, in Kitty Foyle, page 23:
- ...the chlorides Mother was always throwing into the little outdoor backhouse...
- Oxford English Dictionary. "back-house, n."