Definition of underworld noun from the Oxford Advanced Learner's Dictionary



    BrE BrE//ˈʌndəwɜːld//
    ; NAmE NAmE//ˈʌndərwɜːrld//
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  1. 1the people and activities involved in crime in a particular place the criminal underworld the Glasgow underworld the dark underworld of drug abuse and petty crime
  2. 2the underworld (in myths and legends, for example those of ancient Greece) the place under the earth where people are believed to go when they die Orpheus in the Underworld
  3. Extra examples He ran an import-export business and had underworld contacts in Japan. She was a shady figure in the Dublin underworld. the dark underworld of smuggling
See the Oxford Advanced American Dictionary entry: underworld