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English definition of “cave in”

cave in

 /ˈkeɪv ˈɪn/
verb phrasal verb with cave

(FALL IN)

(of a structure) to fall in suddenly, esp. because of a lack of support: The building’s roof caved in under the weight of the snow.
(Definition of cave in phrasal verb, verb from the Cambridge Academic Content Dictionary © Cambridge University Press)
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