Meaning of angle-off

an•gle-off

Pronunciation: (ang'gul-ôf", -of"), [key]
— n.
  1. the angle formed by the line of flight of an aerial target and the line of sight on a gun of an attacking aircraft.
  2. the angle formed by the line of flight of an attacking aircraft and that of an aerial target.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.