backchannel


back·chan·nel

B5011300 (băk′chăn′əl)n.1. A means of conveying information as an alternate to a regular avenue of communication, especially in government and diplomacy.2. A usually subconscious utterance or gesture made by a listener in a conversation indicating that the listener is paying attention or understands what is being said.
back′chan′nel adj. & v.

backchannel

(ˈbækˌtʃænəl) n (Government, Politics & Diplomacy) an unofficial or covert means of conveying information, originally or esp in political or diplomatic circles