Definition & Meaning of "arrow slit"

What is an "arrow slit"?

An arrow slit is a narrow opening in a wall or fortification, primarily designed for archers to shoot arrows while remaining protected inside. These slits are typically vertical or angled, allowing defenders to aim and fire at approaching enemies without exposing themselves to direct attack. Arrow slits are commonly found in castles, fortresses, and city walls, providing a strategic advantage during sieges or battles. The design of arrow slits maximizes visibility and firing range while minimizing the risk to the defenders, making them an important feature in medieval military architecture.