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English definition of “mailbag”

mailbag

noun uk   /ˈmeɪl.bæɡ/ us  
[C] (UK also postbag) a large, strong bag used by the post office for transporting and carrying letters and parcelsThe postal system [C usually singular] the number of letters, emails, etc. received at one time or on one subject: Since the controversial programme was broadcast, the BBC's mailbag has been bulging.The postal system
(Definition of mailbag from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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