Cave
Part of speech: verb
Definition: To surrender. To collapse. To hollow out or undermine. To engage in the recreational exploration of caves; to spelunk. In room-and-pillar mining, to extract a deposit of rock by breaking down a pillar which had been holding it in place. To work over tailings to dress small pieces of marketable ore.
Part of speech: noun
Definition: 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. A naturally-occurring cavity in bedrock which is large enough to be entered by an adult. A shielded area where nuclear experiments can be carried out. Debris, particularly broken rock, which falls into a drill hole and interferes with drilling. A collapse or cave-in. The vagina. A group that breaks from a larger political party or faction on a particular issue.
Part of speech: interjection
Definition: look out!; beware!
Cavern
Part of speech: noun
Definition: a large cavean underground chamber