What is Outhouse?

Alternative Forms: Outhouses
Legal Definition
An outhouse, also known by many other names, is a small structure, separate from a main building, which covers one or more toilets. This is typically either a pit latrine (long drop) or a bucket toilet, but other forms of dry (non-flushing) toilets may be encountered. The term may also be used to denote the toilet itself, not just the superstructure.

Outhouses were in use in cities of developed countries (e.g. Australia) well into the second half of the twentieth century. They are still common in rural areas and also in cities of developing countries. Outhouses that are covering pit latrines in densely populated areas can cause groundwater pollution.

In some localities and varieties of English, particularly outside North America, the term "outhouse" refers not to a toilet, but to outbuildings in a general sense: sheds, barns, workshops, etc.
-- Wikipedia
Legal Definition
Buildings adjoining to or belonging to dwelling-houses.

2. It is not easy to say what comes within and what is excluded from the meaning of out-house. It has been decided that a school-room, separated from the dwelling-house by a narrow passage about a yard wide, the roof of which was partly upheld by that of the dwelling-house, the two buildings, together with some other, and the court which enclosed them, being rented by the same person, was properly described as an out-house: Russ. & R. C. C. 295; see, for other cases, 3 Inst. 67; Burn's Just., Burning, II; 1 Leach, 49; 2 East's P. C. 1020, 1021. Vide House.
-- Bouviers Law Dictionary
Legal Definition
Any house necessary for the purposes of Ilfe, in which the owner does not make his constant or principal residence, is an outhouse. State v. O'Brien, 2 Root (Co.nn.) 516. A smaller or subordinate building connected with a dwelling, usually detached from it and standing at a little distance from it, not intended for persons to live in, but to serve some purpose of convenience or necessity; as a bam, a dairy, a toolhouse, and the like.
-- Black's Law Dictionary
Legal Definition
A house appurtenant to a dwelling and within the curtilage. See 88 N. C. 656.
-- Ballentine's Law Dictionary