- noun a short or informal name given to someone
- verb to give a nickname to someone
- An alternate name utilized to identify oneself, another individual, a group, or an entity. Used, for instance, to identify oneself when utilizing an instant messaging service, or to identify an email addressee.
Information & Library Science
- noun an alphabetical list of frequently used names on e-mail, giving the corresponding full and official names and easy access to addresses
- noun a name (often humorous), which is given to or used by a person instead of his or her real name