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

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

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

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

5. (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.

abri air-raid shelter antre bend bomb shelter bombproof bow bowl break break down breakdown breaking up breakup buckle bunker burrow capitulate cataclysm catastrophe cave in cave-in cavern cavity collapse concave concealment couch cove cover covert coverture crack-up crash crumple cup cyclone cellar debacle decline defer deflate den disaster dish droop dugout earth fall in fallout shelter flop flop down flump flump down fold fold up form founder foxhole funk hole give way go go down grot grotto hole hollow hollow out implode knuckle knuckle under lair lapse lodge lower mew plop plop down plump puncture run safety zone sag set settle settle down sewer shelter shipwreck sink sink down slouch slump slump down smash smashup storm cave storm cellar submerge submit subside subterrane subterranean subway succumb surrender swag total loss trench tunnel warren washout wrack wreck yield