What is a glancing hit in warhammer 40000?

In Warhammer 40,000, a glancing hit occurs when a weapon's attack does not penetrate the armor of a vehicle but still manages to strike it in a way that may cause damage. This type of hit typically results from rolling a lower result than needed to score a penetrating hit but still achieving a successful attack roll. Glancing hits can cause minor effects, such as reducing the vehicle's speed or causing it to lose a weapon, depending on the specific rules of the game edition being played. In many cases, glancing hits are resolved using a different damage table than penetrating hits.