Definition of superuser in English:

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superuser

Pronunciation: /ˈso͞opərˌyo͞ozər/

noun

A user of a computer system with special privileges needed to administer and maintain the system; a system administrator.
Example sentences
  • In this case, the superuser is known as the SysOp, or system operator.
  • The superuser is often a privileged user who has unrestricted access to the whole system, all commands and all files regardless of their permissions.
  • As a result a maliciously constructed message might allow hackers to execute arbitrary commands on a target system with superuser privilege.

For editors and proofreaders

Syllabification: su·per·us·er

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