(1):

(v. i.) To fall in or down; as, the sand bank caved. Hence (Slang), to retreat from a position; to give way; to yield in a disputed matter.

(2):

(v. i.) To dwell in a cave.

(3):

(n.) To make hollow; to scoop out.

(4):

(n.) A hollow place in the earth, either natural or artificial; a subterraneous cavity; a cavern; a den.

(5):

(n.) 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.

(6):

(n.) Any hollow place, or part; a cavity.