Spanish law. A measure of land, which is different in different provinces. In those parts of the United States, which formerly belonged to Spain, the caballeria is a lot of one hundred feet front and two hundred feet deep, and equal, in all respects, to five peonias. It can be between 30 and 200 acres in other former Spanish territories. A Spanish feudal tenure held by a soldier which was called a caballeria. This eventually came to refer to the area of land.