Source : WordNet®

email
     n : (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 [syn: {electronic
         mail}, {e-mail}] [ant: {snail mail}, {snail mail}, {snail
         mail}]

email
     v : communicate electronically on the computer; "she e-mailed me
         the good news" [syn: {e-mail}, {netmail}]

Source : Free On-Line Dictionary of Computing

e-mail
     
        {electronic mail}