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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 log 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.

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?

hollow adjective (SOUND)

(of sound) as if made by hitting an empty container: a hollow sound This tree trunk sounds hollow.
hollowness
noun [U] uk   /-nəs/ us  
the hollowness of fame/success

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. US a valley: We used to go for long walks in the hollow. Sleepy Hollow
(Definition of hollow from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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