(US) First class mail that provides the sender proof of mailing and a delivery record.

Alternative form of mailbox

(chiefly US, idiomatic) To work diligently; to serve as the principal performer of a demanding task or set of tasks.

(historical) A defensive garment made of metal scales or interlinked metal rings.

Abbreviation of voice mail.

(historical) A postal mail system used in America during World War II for correspondence with soldiers stationed abroad. Letters were censored, copied to film, and printed back onto paper at their destination.

Small-scale artworks sent through the postal service as part of a populist artistic movement.

plural of junk mail

plural of coat of mail

plural of mail relay