SINKHOLE

Pronunciation (US):

(GB):

 I. (noun) 

Sense 1

Meaning:

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

Synonyms:

sink; sinkhole; swallow hole

Classified under:

Nouns denoting natural objects (not man-made)

Hypernyms ("sinkhole" is a kind of...):

depression; natural depression (a sunken or depressed geological formation)

Credits