n. A hollow place in the earth; especially, a natural cavity of considerable size, extending more or less horizontally into a hill or mountain; a cavern; a den.n. A cellar; a subterranean chamber.n. Any hollow place or part; a cavity.n. The ash-pit of a glass-furnace.n. [capitalized] A name given to a party in the British Parliament who seceded from the Liberals on the reform bill introduced by them in 1866. See Adullamite.n. Any small faction of seceders or dissidents in Parliament.To make hollow; hollow out.To dwell in a cave.To fall in and leave a hollow, as earth on the side of a well or pit: absolutely, or with in: as, the earth began to cave.Figuratively, to break down; yield; give up; submit; knock under: absolutely, or with in: as, at this he caved.To toss or pitch: as, to cave hay.To toss in a threatening or haughty manner: as, to cave the horns (said of horned cattle); to cave the head.To clean (threshed grain) by tossing or raking (it) on a barn-floor or a threshing-floor.To move; rush.To sink; be plunged or buried.n. A toss, as of the head.n. A cave-in.