CAVERN Meaning of CAVERN in English [ 'kav(ə)n ]■ noun1》 a large cave or chamber in a cave. 2》 a vast, dark space.Derivatives~ous adjective~ously adverb OriginME: from OFr. ~e or from L. ~a , from cavus 'hollow'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004