Submitted by György Chityil ... on Fri, 01/19/2018 - 22:09 Hierarchy: NounDescription: {{derogatory|by extension}} An insular communication space that is of no interest to outsiders or refuses their input.Ngram: echo chamberNgram Text: echo chamberSource: WiktionaryIssue: 0Wiktionary tag: by extensionNgram Count: 2