~ 1 [ keɪv ]
■ noun a large natural underground chamber.
■ verb
1》 explore ~s as a sport.
2》 ( ~ in or US also ~ ) (of a roof or walls) subside or collapse.
Derivatives
~r noun
caving noun
Origin
ME: from OFr., from L. cava , from cavus 'hollow'.
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~ 2 [ 'keɪvi ]
■ exclamation Brit. school slang, dated look out!
Phrases
keep ~ act as lookout.
Origin
L., imperative of ~re 'beware'.