Noun
superuser (plural superusers)
(computing) A user with complete access to the operating system and its configuration.
Extended attributes stored in the root namespace can be modified only by the superuser, while attributes in the user namespace can be modified by any user with permission to write to the file. Source: Internet
For example, a buffer overrun exploit can allow an attacker to gain access to the operating system's API with superuser privileges. Source: Internet
I don't have permission to look at that, because only a superuser can look at the log. Source: Internet
Some applications don’t work unless a person was to hack the OS and gain “superuser” privileges. Source: Internet
The default web browser is called from the normal user id to avoid browsing with superuser id (a security issue). Source: Internet
The superuser will then send you this information and reset your password so that you can access your account. Source: Internet