Security
ACL
Abbreviation for Access Control List
In short and in plain language
An ACL is a list of rights.
It sets out who may use which parts of a system. So it says who may do what.
In tools for running websites, it controls what each user account may do. It is one part of managing rights.
Definition
An ACL is a list that defines who may access which areas or functions of a system. In content management systems it controls the permissions of user accounts. It is one building block of permission management.