Noun | 1. | ![]() mail service, postal service, mail, post - the system whereby messages are transmitted via the post office; "the mail handles billions of items every day"; "he works for the United States mail service"; "in England they call mail `the post'" electronic mail, email, e-mail - (computer science) a system of world-wide electronic communication in which a computer user can compose a message at one terminal that can be regenerated at the recipient's terminal when the recipient logs in; "you cannot send packages by electronic mail" electronic mail, email, e-mail - (computer science) a system of world-wide electronic communication in which a computer user can compose a message at one terminal that can be regenerated at the recipient's terminal when the recipient logs in; "you cannot send packages by electronic mail" electronic mail, email, e-mail - (computer science) a system of world-wide electronic communication in which a computer user can compose a message at one terminal that can be regenerated at the recipient's terminal when the recipient logs in; "you cannot send packages by electronic mail" |