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English definition of “underworld”

underworld

noun [S] uk   /ˈʌn.də.wɜːld/ us    /-dɚ.wɝːld/

underworld noun [S] (CRIME)

the part of society consisting of criminal organizations and activities

underworld noun [S] (IN STORIES)

the underworld in mythology, a place under the earth where the spirits of the dead go
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(Definition of underworld from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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