plase help my

[Unregistered]

I have to test on adg closed Can you help me to understand the rule

[Hi_there_Carl]

Closed

adjective: not open or affording passage or access (Example: "The many closed streets made travel difficult")
adjective: used especially of mouth or eyes (Example: "He sat quietly with closed eyes")
adjective: blocked against entry (Example: "A closed porch")
adjective: of a curve or surface; having no end points or boundary curves; of a set; having members that can be produced by a specific operation on other members of the same set; of an interval; containing both its endpoints
adjective: not having an open mind (Example: "A closed mind unreceptive to new ideas")
adjective: not open to the general public (Example: "A closed meeting")
adjective: with shutters closed
adjective: shut down (Example: "The airport is closed because of the weather")
adjective: (of the wings of birds and insects) closed together
adjective: not open