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English definition of “mailbox”

mailbox

noun [C]     /ˈmeɪlbɒks/ US
AT HOME a small box outside your home where letters are delivered The postal system
IN PUBLIC PLACE (UK letterbox, post box) a large , metal container in a public place where you can post letters The postal system
ON COMPUTER the part of a computer program that shows on a computer screen where electronic messages are stored Computer programming and software
(Definition of mailbox noun from the Cambridge Learner's Dictionary © Cambridge University Press)

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