What is hellfire mean?

Answer 1

Hellfire like the missile? HELicopter Launched, FIRE and forget. Which is a strange name for a laser guided missile...the idea is, you put a cavalry scout on the ground with the laser designator and a crew in the Apache. The scout aims his laser at the thing you're trying to remove from the battlefield. Once the Apache locks onto it, the missile is fired and the helicopter crew departs, leaving the scout to guide the missile in.