Meaning of “hollow sth out” in the English Dictionary

british dictionary

"hollow sth out" in British English

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hollow sth out

phrasal verb with hollow uk /ˈhɒl.əʊ/ us /ˈhɑː.loʊ/ verb

to make an empty space inside something:

Sand carried by the wind has hollowed out the base of the cliff.

(Definition of “hollow sth out” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)