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English definition of “mail”

mail

noun [U]     /meɪl/
LETTERS A2 (also UK post) letters and parcels that are brought by post: We got loads of mail this morning.The postal system
SYSTEM (also UK post) A2 the system by which letters and parcels are taken and brought: Send it by mail. The letter is in the mail. → See also email, junk mail, snail mail, surface mail, voice mailThe postal system
(Definition of mail noun from the Cambridge Learner's Dictionary © Cambridge University Press)

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