Definition of sinkhole in English:

sinkhole

Syllabification: sink·hole
Pronunciation: /ˈsiNGkˌhōl
 
/

noun

A cavity in the ground, especially in limestone bedrock, caused by water erosion and providing a route for surface water to disappear underground.
More example sentences
  • The enclosed depressions are complex forms of dolines or sinkholes, which act as centripetal drainage basins.
  • Karst is an area of irregular limestone in which erosion has produced fissures, sinkholes, underground streams, and caverns.
  • The wells at Chichén Itzá are actually large limestone sinkholes - known in Spanish as cenotes (underground pools) - and they are one of the singular aspects of the site.

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