Definition of mail
(Entry 1 of 4)
1a
: material (such as letters and packages) sent or carried in a postal system
sorting through the mail
also
: similar material distributed within an organization
interoffice mail
b
: email sense 2a
c
: a conveyance that transports mail
2
: a nation's postal system
a letter sent through the mail
—often used in plural packages sent through the mails
mailed; mailing; mails
Definition of mail (Entry 2 of 4)
: to send by mail : post entry 4
Definition of mail (Entry 3 of 4)
1
: armor made of metal links or sometimes plates
2
: a hard enclosing covering of an animal (such as a tortoise)
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Merriam-Webster unabridged
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Time Traveler for mail
The first known use of mail was before the 12th century
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