English

Definition of sinkhole noun from the Oxford Advanced Learner's Dictionary

 

sinkhole

 noun
noun
BrE BrE//ˈsɪŋkhəʊl//
 
; NAmE NAmE//ˈsɪŋkhoʊl//
 
(also swallow hole) (geology)
 
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a large hole in the ground that a river flows into, created over a long period of time by water that has fallen as rain
See the Oxford Advanced American Dictionary entry: sinkhole