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back announce
back away
back bacon
back bar material
back boiler
back boundary line
back burner
back catalog
back channel
back concession
back copy
back country
back crawl
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back door
back down
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back channel
back chan·nel (plural back chan·nels)


noun 
Definition:
 
indirect means of exchanging sensitive information: a covert way of exchanging sensitive information in politics or diplomacy that circumvents the usual procedures
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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