backchannel

back chan nel |ˈbakˌCHanl ˈbæktʃænl |(also back channel ) ▶noun 1 a secondary or covert route for the passage of information: the agency offered a reliable backchannel to Washington | [ as modifier ] : backchannel briefings. 2 Psychology a sound or gesture made to give continuity to a conversation by a person who is listening to another.

backchannel

back |channel |ˈbaktʃanl | ▶noun 1 a secondary or covert route for the passage of information: we used him as a diplomatic backchannel. 2 Psychology a sound or gesture made to give continuity to a conversation by a person who is listening to another.