In weaponry, a Kill Box is a three-dimensional target area, defined to facilitate the integration of coordinated joint weapons fire.
It is a joint forces coordination measure enabling air assets to engage surface targets without needing further coordination with commanders and without terminal attack control. The space is defined by an area reference system, but could follow terrain features, be located by grid coordinates or a radius from a center point.
A type of Fire Support Coordinating Measure (FSCM), a Kill Box is often defined by a grid reference system - based on lines of Latitude and Longitude - superimposed upon a map of an area of operation. Each square of the grid may be sub-divided into smaller boxes, each of which may carry its own level of permission - or restriction - on the use of air-to-surface or surface-to-surface weapons.
A kill box is a temporary autonomous zone of slaughter.