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English definition of “postbag”


noun [U]     /ˈpəʊstbæɡ/ UK ( US mailbag) COMMUNICATIONS
the number of letters received at one time or on one subject: Travel received the second highest number of complaints in the consumer watchdog's postbag of 350,000 letters a year.
(Definition of postbag noun from the Cambridge Business English Dictionary © Cambridge University Press)
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