Threshing (thrashing) was originally "to tramp or stamp heavily with the feet" and was later applied to the act of separating out grain by the feet of people or oxen and still later with the use of a flail. A threshing floor is of two main types: 1) a specially flattened outdoor surface, usually circular and paved, or 2) inside a building with a smooth floor of earth, stone or wood where a farmer would thresh the grain harvest and then winnow it. Animal and steam powered threshing machines from the nineteenth century onward made threshing floors obsolete. The outdoor threshing floor was either owned by the entire village or by a single family, and it was usually located outside the village in a place exposed to the wind.