| Noun | 1. | snail mail - any mail that is physically delivered by the postal service; "email is much faster than snail mail"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'" e-mail, electronic mail, email - (computer science) a system of world-wide electronic communication in which a computer user can compose a message at one terminal that is generated at the recipient's terminal when he logs in e-mail, electronic mail, email - (computer science) a system of world-wide electronic communication in which a computer user can compose a message at one terminal that is generated at the recipient's terminal when he logs in e-mail, electronic mail, email - (computer science) a system of world-wide electronic communication in which a computer user can compose a message at one terminal that is generated at the recipient's terminal when he logs in | |