'Cavern' definitions:

Definition of 'cavern'

(from WordNet)
noun
Any large dark enclosed space; "his eyes were dark caverns"
noun
A large cave or a large chamber in a cave
verb
Hollow out as if making a cavern [syn: cavern, cavern out]

Definition of 'Cavern'

From: GCIDE
  • Cavern \Cav"ern\, n. [L. caverna, fr. cavus hollow: cf. F. caverne.] A large, deep, hollow place in the earth; a large cave. [1913 Webster]