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Sinkhole
4 dictionary results for: sinkhole
Dictionary.com Unabridged (v 1.1) - Cite This Source - Share This
sink·hole       [singk-hohl] Pronunciation Key
–noun
1.a hole formed in soluble rock by the action of water, serving to conduct surface water to an underground passage.
2.Also called sink. a depressed area in which waste or drainage collects.

[Origin: 1425–75; late ME; see sink, hole]
American Heritage Dictionary - Cite This Source - Share This
sink·hole       (sĭngk'hōl')  Pronunciation Key 
n.   A natural depression in a land surface communicating with a subterranean passage, generally occurring in limestone regions and formed by solution or by collapse of a cavern roof.

WordNet - Cite This Source - Share This
sinkhole

noun
a depression in the ground communicating with a subterranean passage (especially in limestone) and formed by solution or by collapse of a cavern roof 

The American Heritage Science Dictionary - Cite This Source - Share This
sinkhole       (sĭngk'hōl')  Pronunciation Key 
A natural depression in a land surface formed by the dissolution and collapse of a cavern roof. Sinkholes are roughly funnel-shaped and on the order of tens of meters in size. They generally occur in limestone regions and are connected to subteranean passages. Also called sink. See more at karst topography.

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