Group Membership
Noun · Security & Infosec
Definitions
A user's or system's inclusion in an access-control group that grants permissions, roles, or policy scope. Group membership is fundamental in directory services because many privilege decisions are made through nested or inherited groups rather than direct account assignments.
In plain English: Belonging to an access-control group that gives certain permissions.
Example: "The root cause was stale group membership that still gave the contractor access to finance systems."