The door is closed but not shut.

太晚了，所有店门都关上了。

youdao

The door is closed him.

门是被他关的。

youdao

His mother is not at home and the door is closed.

他的妈妈不在家而且门是关着的。

youdao

A book drop is the small metal door in the wall of the building where people can return books when the library is closed.

VOA: special.2009.02.23

If a group of like-minded people develop and enforce their own rules, they are likely to believe in them, which means they will keep them in mind even when the door is closed.

ECONOMIST: Why it is so difficult to regulate lawyers and doctors

My advice is that if you really want to keep you life behind closed doors, make sure the door is locked.

FORBES: Should there be doorman-resident privilege?

By far, my biggest beef with a closed door is the fact it forces everyone else to interrupt you if they need something.

FORBES: Connect