electromagnetic waveelectromagnetic wave
The definition of an electromagnetic wave is one that moves by the power of electric and magnetic fields.
An example of an electromagnetic wave is what provides the power in a microwave.
a wave propagated through space or matter by oscillating electric and magnetic fields: in a vacuum it travels at the speed of light
A wave of electromagnetic energy that is radiated by an accelerating or oscillating electric charge and propagates through a vacuum or a material medium as a periodic disturbance of the electromagnetic field at a frequency within the electromagnetic spectrum.