Synonyms for back channel
back chan·nel

Princeton's WordNet

1. back channeladjective

   an alternative to the regular channels of communication that is used when agreements must be made secretly (especially in diplomacy or government)

   "they negotiated via a back channel"

2. back-channeladjective

   via a back channel

   "the failure of back-channel negotiations"

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How to say back channel in sign language?

How to use back channel in a sentence?

1. Authors Kornbluh and LeoGrande:

   They remain anonymous in part so they can continue effective back channel diplomacy in the future ... when and if it is needed for Washington and Havana to resolve remaining obstacles to fully normal relations.

2. Roger Stone:

   I've been completely honest about this. I described it various ways on the record in a speech to a large number of Trump supporters, i described it as a back channel. I think in another interview I may have said intermediary. In the third interview I said a mutual friend. They are all true. They're all consistent and what I learned from this person, and don't blame me if I had better sources than the mainstream media was very simply this, that Julian Assange had a substantial of information on Hillary Clinton and Julian Assange would drop it in October.

3. Michael Dreeben:

   Here you have somebody who was a campaign official in the Trump campaign, where he had longstanding ties to Russia-backed politicians in the Ukraine, what (was) the nature of those connections? Did they provide a means for surreptitious communications? Did they provide a back channel to Russia?

4. Mickey Bergman:

   Bill Richardson operated a back channel with the Germans, bill Richardson didn't need the Mickey Bergman administration for that, especially after the Wang release. Bill Richardson'll do the back channel and then from the Iranian perspective they get their man out.

5. Richard Blumenthal:

   This kind of back channel for the President's personal attorney, a political operative ought to... deeply alarm and frighten America because it in essence, weaponizes law enforcement and the Department of Justice as a political tool.