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1. Property law a person authorized to manage an estate, esp when the owner has died intestate or without having appointed executors
2. a person who manages a computer system
administratorA person responsible for managing a computer or network and who has full access to the hardware and software. Users are generally the administrators of their own computers, because fresh out of the box, whoever sets up the machine can create administrator privileges for the user.
If the machines are company owned, users are given fewer privileges. For example, they cannot change certain permissions or internal files. See root level, privilege and access rights.
There Are Different Kinds of Administrators
In an organization's IT department, technicians often have administrator titles. See data administrator, database administrator, network administrator and system administrator.