2.(Math.) 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.. Antonym: open.
4.Having skin drawn so as to obstruct the opening; used of mouth or eyes. Opposite of open. "He sat quietly with closed eyes" (Narrower terms: blinking, winking; compressed, tight; squinched, squinting)
5.Requiring union membership; of a workplace; as, a closed shop. (prenominal)
7.Hidden from the public; as, a closed ballot.
8.Not open to the general public; as, a closed meeting.
9.Unsympathetic; of a person's attitude. "A closed mind unreceptive to new ideas"
10.Surrounded by walls. "A closed porch"
11.Made compact by bending or doubling over; as, a closed map.
12.Closed or fastened with or as if with buttons. (Narrower terms: buttoned (vs. unbuttoned))
13.Not engaged in activity; of an organization or business establishment. "The airport is closed because of the weather"; "The many closed shops and factories made the town look deserted"