expression, godan verb (-ru)
become locked; lock
Intransitive expression meaning a door, window, or container becomes locked or is in a locked state. Often used to describe the result of locking, not the action of locking something.
See also: 鍵をかける
玄関の鍵がかかっているか確認してください。
Please check if the front door is locked.
この引き出しは鍵がかからない。
This drawer doesn't lock.