Main Entry: cav·ern·ous

Pronunciation: \ˈka-vər-nəs\

Function: adjective

Date: 15th century

1 a : having caverns or cavities b of animal tissue : composed largely of vascular sinuses and capable of dilating with blood to bring about the erection of a body part
2 : constituting or suggesting a cavern <a cavernous warehouse>

— cav·ern·ous·ly adverb