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English definition of “hollow”

hollow

adjective uk   /ˈhɒl.əʊ/ us    /ˈhɑː.loʊ/

hollow adjective (EMPTY)

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)

hollow adjective (NOT SINCERE)

C2 (of situations, feelings, or words) without value, or not true or sincere: It was something of a hollow victory - she won the case but lost all her savings in legal fees. Even sex had become a hollow pleasure. Will their good intentions become realities or are they just hollow promises?Affected and insincere

hollow adjective (SOUND)

(of sound) as if made by hitting an empty container: a hollow sound This tree trunk sounds hollow.Describing qualities of sound
hollowness
noun [U] uk   /-nəs/ us  
the hollowness of fame/successAffected and insincereHoles, hollows and dips

hollow

noun [C] uk   /ˈhɒl.əʊ/ us    /ˈhɑː.loʊ/
a hole or empty space in something, or a low area in a surface: The dog found a hollow in the ground to hide in from the wind.Holes, hollows and dips US a valley: We used to go for long walks in the hollow. Sleepy HollowValleys
(Definition of hollow from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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