Cave n.
 1. A hollow place in the earth, either natural or artificial; a subterraneous cavity; a cavern; a den.
 2. Any hollow place, or part; a cavity. [Obs.] “The cave of the ear.”
 3. Eng. Politics A coalition or group of seceders from a political party, as from the Liberal party in England in 1866. See Adullam, Cave of, in the Dictionary of Noted Names in Fiction.
 Cave bear Zool., a very large fossil bear (Ursus spelæus) similar to the grizzly bear, but large; common in European caves.
 Cave dweller, a savage of prehistoric times whose dwelling place was a cave. --Tylor.
 Cave hyena Zool., a fossil hyena found abundanty in British caves, now usually regarded as a large variety of the living African spotted hyena.
 Cave lion Zool., a fossil lion found in the caves of Europe, believed to be a large variety of the African lion.
 Bone cave. See under Bone.