Meaning of “surface mail” in the English Dictionary

business-english dictionary

"surface mail" in Business English

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surface mailnoun [ U ]

uk us

COMMUNICATIONS, TRANSPORT the service in which letters, packages, etc., are sent by road, ship, or train, rather than by plane, or mail that is sent in this way:

send sth (by) surface mail I sent the package by surface mail.
Surface mail takes much longer to arrive.

(Definition of “surface mail” from the Cambridge Business English Dictionary © Cambridge University Press)