closed
1 adj A closed group of people does not welcome new people or ideas from outside.
usu ADJ n (Antonym: open)
It was to be a closed circle of no more than twelve women..., It is a closed society in the sense that they've not been exposed to many things.
2 →
close →
a closed book →
book →
behind closed doors →
door
closed-circuit , closed circuit
A closed-circuit television or video system is one that operates within a limited area such as a building. adj ADJ n
There's a closed-circuit television camera in the reception area.
closed shop (closed shops plural )If a factory, shop, or other business is a closed shop, the employees must be members of a particular trade union. (BUSINESS) n-count
...the trade union which they are required to join under the closed shop agreement.