Definitions of closed session
(also: executive session) a meeting that only people that are members of a particular organization can attend (unless they have been invited), usually one held in secret
The agenda includes a possible vote to go into closed session concerning an issue pending with a federal lawsuit against the sheriff's office
a hearing or other meeting that is held in private, especially in a judge's chambers (=office), away from the public and from reporters etc
I can't discuss anything that occurred in closed session.