英汉词典

1. 封闭的；不接受新人（或新思想）的
    A closed group of people does not welcome new people or ideas from outside.

    e.g. It was to be a closed circle of no more than twelve women...
           它本来应该是一个不超过12名女性的封闭的小圈子。
    e.g. It is a closed society in the sense that they've not been exposed to many things.
           他们接触的事不多，从这一方面来说这是个封闭的社团。

2. see also: close
    a closed book -> see book
    behind closed doors -> see door