A Cave

A large, naturally-occurring cavity formed underground or in the face of a cliff or a hillside.
A hole, depression, or gap in earth or rock, whether natural or man-made.
A storage cellar, especially for wine or cheese.
A place of retreat, such as a man cave.
(caving) A naturally-occurring cavity in bedrock which is large enough to be entered by an adult.
(nuclear physics) A shielded area where nuclear experiments can be carried out.
(drilling, uncountable) Debris, particularly broken rock, which falls into a drill hole and interferes with drilling.
(mining) A collapse or cave-in.
(figuratively, also slang) The vagina.
(slang, politics, often "Cave") A group that breaks from a larger political party or faction on a particular issue.
(obsolete) Any hollow place, or part; a cavity.
(programming) A code cave.