Submitted by György Chityil ... on Sat, 01/20/2018 - 00:48 Hierarchy: NounDescription: {{aviation|telecommunications}} The repetition of a message one has received, in order to acknowledge it.Ngram: readbackNgram Text: readbackSource: WiktionaryIssue: 0Wiktionary tag: aviationtelecommunicationsNgram Count: 1