Definition of backchannel in English:

backchannel

noun

  • 1A secondary or covert route for the passage of information.

    ‘we used him as a diplomatic backchannel’
    • ‘Secret White House backchannels (discovered from recently released White House tapes) are used to support the book's contention.’
    • ‘In a sense, he is right that backchannels always exist and always will.’
    • ‘A friend calls my weblog ‘the backchannel to my brain’, and in a way, it is.’
  • 2Psychology
    A sound or gesture made to give continuity to a conversation by a person who is listening to another.

    as modifier ‘supportive backchannel cues’
    • ‘Amongst these are what have been characterised in the literature as backchannels, minimal response or receipt tokens, and include items such as Yeah, Oh, Right, and Great.’

Pronunciation

backchannel

/ˈbaktʃanl/