HTK meaning in Military and Defence ?

Hit-to-kill, or kinetic kill, is a term used primarily in the military aerospace field to describe weapons that deliver their destructive power by hitting the target at high velocity and do not contain an explosive warhead. It has been used primarily in the anti-ballistic missiles (ABM) and anti-satellite weapons (ASAT) area, but some modern anti-aircraft missiles are also hit-to-kill. Hit-to-kill systems are part of the wider class of kinetic projectiles, a class that has widespread use in the anti-tank field.