Definitions for "Indirect Fire"
Keywords:  artillery, weapon, inf, target, arc
A weapon capable of firing at something which it can't see -- for instance, by being capable of arcing fire over an intervening obstacle -- is said to be capable of Indirect Fire. Most modern artillery, for instance, are indirect-fire weapons.
fire delivered on a target that is not itself used as the point of aim for the weapons
Fire delivered at a target that cannot be seen from the gun position.