1. < operating system > The Unix superuser account (with user name "root" and user ID 0) that overrides file permissions. The term avatar is also used. By extension, the privileged system-maintenance login on any operating system .
See root mode , go root , wheel .
[ Jargon File ]
(1994-10-27)
2. < operating system > root directory .
(1996-11-21)
3. root node .
(1998-11-14)