Definitions for "SINKHOLE"
A small, steep depression caused in karst topography by the dissolution and collapse of subterranean caverns in carbonate formations.
A surface depression created by underground collapse.
A depression on the surface, mainly in cave country. This is developed by a roof collapse in a cave or when the limestone which underlays the soil is slowly dissolved by water.
Keywords:  dimple, shrinking, weld, cooling, stock
In welding, a dimple on the surface of stock caused by shrinking of the weld during cooling.
Keywords:  occurrence, natural
a natural occurrence