What does Halo Mean?

Well, there are a couple of definitions for ‘halo.’ It basically means ‘circle.’ In Christian mythology, it’s a ring of light placed around the heads of saints and angels. It’s also used to describe rings of diaphanous (airy or filmy) material, like in ‘a ring of smoke.’ If you’re looking for the military meaning, it stands for ‘High Altitude-Low Opening.’ It’s used by parachutists basically meaning that they open their chutes while at a low altitude.