Open English Wordnet
Nouns
(n)electronic mail, e-mail, email(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”
(n)email message, e-mail message, email, e-maila message sent over the internet via the email system
(n)email address, e-mail address, email, e-mailan identifier that a person uses as their identity to communicate on the email system