1. A stick inserted horizontally behind a door so that the door cannot be pushed open. 2. Lock the door: Close the door.

Detailed explanation

1. collapse

(1). Seen from the door, "one" looks like a bolt. Original meaning: horizontally inserted in the door)?

Latch, the door is closed horizontally. -Fan Chengda's Gui Yu Hai Zhi Heng magazine

(2) Another example is bolts; Bolt it.

Advanced Chinese dictionary latch shuān Traditional: latch