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English definition of “box number”

box number

noun [C]     (also box) COMMUNICATIONS
a number you can give for people to communicate with you instead of your address , especially in advertisements : When the newspaper inserts a box number in an ad and forwards the replies , the service charge is $ office/postal/PO box number He asked for cheques to be sent to a postal box number .
(Definition of box number noun from the Cambridge Business English Dictionary © Cambridge University Press)
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