N-COUNT
挂锁;扣锁
A padlock is a lock which is used for fastening two things together. It consists of a block of metal with a U-shaped bar attached to it. One end of the bar is released by turning a key in the lock.
例句
They had put a padlock on the door of his flat.
他们已经在他的公寓门上上了把挂锁。