mailbox Meaning in the Cambridge English Dictionary
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Meaning of “mailbox” in the English Dictionary

"mailbox" in British English

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mailboxnoun [C]

uk   /ˈmeɪl.bɒks/  us   /-bɑːks/
in the US, a ​boxoutside a person's ​house where ​letters are put US (UK letterbox, postbox) a ​metalcontainer in the ​street or other ​publicplace in which you can put ​letters for them to be ​collected and ​sent to someone ​else the ​place on a ​computerscreen that ​shows new ​emails that have ​arrived: Look out for ​ouremails in ​your electronic mailbox.
(Definition of mailbox from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"mailbox" in American English

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mailboxnoun [C]

 us   /ˈmeɪlˌbɑks/
a ​metalcontainer in a ​publicplace where you can put a ​letter you are ​sending by ​mail, or a ​boxoutside a person’s ​house where ​letters are ​sent and ​delivered A mailbox on a ​computer is the ​place where e-mail is ​received, ​sent, and ​stored.
(Definition of mailbox from the Cambridge Academic Content Dictionary © Cambridge University Press)

"mailbox" in Business English

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mailboxnoun [C]

(also mail box) uk   us   /ˈmeɪlbɒks/
COMMUNICATIONS a ​box in an ​office or outside a person's ​home where ​letters are ​delivered: Your mailbox is with all the others near the receptionist's ​desk.
US →  postbox
IT, COMMUNICATIONS the ​part of a ​computerprogram that ​shows on a ​computerscreen where ​electronicmessages are ​stored: Look out for our ​emails in your electronic mailbox. Check your mailbox tomorrow for the ​trip details.
See also
(Definition of mailbox from the Cambridge Business English Dictionary © Cambridge University Press)
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