back-channel Meaning in the Cambridge English Dictionary
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Meaning of “back-channel” in the English Dictionary

"back-channel" in Business English

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back-channeladjective [before noun]

uk   us  
using a different or ​unofficialmethod of ​communication: There have been ​reports about informal back-channel ​peacetalks between the two ​governments. back-channel ​negotiations/​communication
back channel
noun [C]
You can involve the ​audience in a ​presentation by ​incorporating a back ​channel with which they can suggest ​questions, and comment on each other's ​questions.
(Definition of back-channel from the Cambridge Business English Dictionary © Cambridge University Press)
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