Submitted by György Chityil ... on Fri, 01/19/2018 - 20:21 Hierarchy: NounDescription: {{by extension}} A hidden, shadowy, or sinister subculture, such as that of organized crime.Ngram: netherworldNgram Text: netherworldSource: WiktionaryIssue: 0Wiktionary tag: by extensionNgram Count: 1