Military action involving the use of directed-energy weapons, devices, and countermeasures to either cause direct damage or destruction of enemy equipment, facilities, and personnel, or to determine, exploit, reduce, or prevent hostile use of the electromagnetic spectrum through damage, destruction, and disruption. It also includes actions taken to protect friendly equipment, facilities, and personnel and retain friendly use of the electromagnetic spectrum. Also called DEW. See also directed energy; directed-energy device; directed-energy weapon; electromagnetic spectrum; electronic warfare.
Dictionary of Military and Associated Terms. US Department of Defense 2005.