closed

adjective

• not open:rooms with closed doors lined the hallway he sat with his eyes closed
• (of a business) having ceased trading, especially for a short period:he put the “Closed” sign up on the door
• (of a society or system) not communicating with or influenced by others; independent.
• limited to certain people; not open or available to all:the UN Security Council met in closed session
• unwilling to accept new ideas:you’re facing the situation with a closed mind
• Mathematics (of a set) having the property that the result of a specified operation on any element of the set is itself a member of the set.
• Mathematics (of a set) containing all its limit points.
• Geometry of or pertaining to a curve whose ends are joined.