- Verb: To place a letter or other mail matter, properly enveloped or packaged, addressed and stamped, in a mail slot, mail chute, or mail box, provided by the post office department for the reception of mail, or to deliver a letter or other mail matter so prepared to a postman or letter carrier employed by the department. Anne: 63 ALR 932; 29 Am J2d Ev §§ 195, 196. Within the meaning of a cancellation clause in an insurance policy:–to deposit a letter containing a notice of cancellation in the mail, irrespective of its actual receipt by the insured. 29 Am J Rev ed Ins § 386. Noun: Letters, packets, etc. deposited or received for transmission by post to the person or persons to whom they are addressed, in accordance with the postal regulations. 41 Am J1st P O § 48. The original meaning of the word was a covering, and the word thus came to be applied to the bag or packet in which letters and messages were placed, and later to the contents of the bag or packet. See acceptance by mail; competition with the mails; first-class mail; fourth-class mail; franking; letter; mailable matter; packet; parcel post; postoffice; registered letter; second-class mail; thirdclass mail; using mails to defraud.
Ballentine's law dictionary. Anderson, W.S.. 1998.