email

UK: /ˈiːmeɪl/

Collins Concise English Dictionary © HarperCollins Publishers::

email, e-mail / ˈiːmeɪl/ noun

1. short for electronic mail

verb (transitive)

1. to contact (a person) by electronic mail
2. to send (a message, document, etc) by electronic mail

WordReference Random House Learner's Dictionary of American English © 2025

e-mail or E-mail /ˈiˌmeɪl/  n. [uncountable]

1. Computing electronic mail: a system of sending messages from one computer to another or others.

WordReference Random House Unabridged Dictionary of American English © 2025

e-mail  (ē′māl′), n. 

1. Computing a system for sending messages from one individual to another via telecommunications links between computers or terminals.
2. Computing a message sent by e-mail:
   Send me an e-mail on the idea.

v.t. 

3. Computing to send a message to by e-mail.

Also, E-mail, email. 
e-mail, +n. 

1. Computing a message sent by e-mail:
   Send me an e-mail on the idea.

v.t. 

2. Computing to send a message to by e-mail.