Upland South
There is a slight difference in usage between the two terms "Upland South" and "Upper South." The "Upland South" is usually defined based on landforms. This generally refers to the southern Appalachian Mountains or Appalachia region (although not the full region as defined by the Appalachian Regional Commission), the Ozarks and Ouachita Mountains. Also included in the Upland South are the plateaus, hills, and basins between the Appalachians and Ozarks, such as the Cumberland Plateau, part of the Allegheny Plateau, the Nashville Basin, the Shawnee Hills, and the Bluegrass Basin, among others. The southern Piedmont region is often considered part of the Upland South, while the Atlantic Coastal Plain (the Chesapeake region and South Carolina's Lowcountry) are not.