Submitted by György Chityil ... on Fri, 01/19/2018 - 23:49 Hierarchy: AdjectiveDescription: {{context|by extension}} Describing the idle state of a subscriber or PBX user loopNgram: on-hookNgram Text: on-hookSource: WiktionaryIssue: 0Wiktionary tag: by extensionNgram Count: 1