sinkhole
(noun)
noun
1. a depression in the ground communicating with a subterranean passage (especially in limestone) and formed by solution or by collapse of a cavern roof
Similar word(s): sink
Definition categories: object, depression
(noun)
1. a depression in the ground communicating with a subterranean passage (especially in limestone) and formed by solution or by collapse of a cavern roof
Similar word(s): sink
Definition categories: object, depression