1. Military procedures involving the use of electromagnetic energy to determine, exploit, reduce, or to prevent the hostile use of the electromagnetic spectrum, and action which retains friendly use of electromagnetic spectrum.
2. Military action involving the use of electromagnetic and directed energy to control electromagnetic spectrum or to attack a military enemy.

Electronic warfare consists of three divisions: electronic attack, electronic protection, and electronic warfare support.

3. The use of an electromagnetic spectrum by using devices to attack enemy personnel and equipment or to defend against these procedures and techniques.
4. A military action intended to prevent the use of electromagnetic radiation by hostile forces or to keep and to exploit its use by friendly forces.

Electronic warfare includes electronic countermeasures and counter-countermeasures.