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English definition of “hollow”

hollow

adjective (EMPTY)    /ˈhɒl.əʊ/ US  /ˈhɑː.loʊ/
C2 having a hole or empty space inside: a hollow tube Hollow blocks are used because they are lighter. a hollow logEmpty hollow cheeks/eyes If you have hollow cheeks or eyes, your cheeks curve in or your eyes look deep in your head because you are old, tired, or ill.Thin or slender (of people)Not fit and healthyNarrow and thinNot fit and healthyThin or slender (of people) hollowness     /-nəs/ noun [U] the hollowness of fame/successAffected and insincereHoles, hollows and dips
(Definition of hollow adjective (EMPTY) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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