pertaining to or exhibiting magnetism produced by electric charge in motion
"electromagnetic energy"
Relating to electromagnetism
"The electromagnetic spectrum includes all types of radiation emitted by moving electric charges."
In plain English: Something electromagnetic is made of energy that moves through space as waves, like light and radio signals.
"The electromagnetic field is generated by moving electric charges and can exert forces on other charged particles in its vicinity."
The word electromagnetic combines the prefix electro-, meaning electricity, with magnetic to describe phenomena involving both forces. It entered English as a compound term formed from these two distinct concepts of physics.