- noun an electronic storage space with an address in which a user’s incoming e-mail messages are stored
- An area within a storage device in which email is placed and stored. Such storage may be at the site of the computer, or at a remote location as is the case with Web-based mail. Also spelled mail box.
- noun one of several boxes where incoming mail is put in a large building, or a box for putting letters and packages in which you want to post
- noun an address where e-mail messages are received