Alias is a short and more popular phrase for alias dictus. The abbreviation a.k.a., also known as, is frequently used in connection with the description of a person sought by law enforcement officers to disclose the names that the person has been known to use.A fictitious name assumed by a person is popularly termed an alias.he abbreviation a.k.a., also known as, is frequently used in connection with the description of a person sought by law enforcement officers to disclose the names that the person has been known to use. A fictitious name assumed by a person is popularly termed an alias.