back channel

back channel

noun
a secret, unofficial, or informal channel of communication as used in politics or diplomacy: sensitive information passed on through a back channel.

back-channel, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Dictionary.com's 21st Century Lexicon
Main Entry:  back channel
Part of Speech:  n
Definition:  a secret, indirect, or irregular means of communication, esp. for sensitive government and diplomacy matters
Etymology:  1975-80
Usage:  back channel, adj; back channel, v
Dictionary.com's 21st Century Lexicon
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