in Scotland are frequently referred to as "hills" no matter what their height, as reflected in names such as the Cuillin Hills and the Torridon Hills. In Wales, the distinction is more a term of land use and appearance and has nothing to do with height.

For a while, the US defined a mountain as being 1000 ft or more tall. Any similar landform lower than this height was considered a hill. The United States Geological Survey,