1. A means of preventing two circuits from electromagnetically coupling by placing at lest one of the circuits in a grounded enclosure of magnetic conductive material.
2. A process, similar to electrostatic or magnetostatic shielding, for suppressing changing magnetic fields or electromagnetic radiation at a device.
3. Electromagnetic shielding is the process of limiting the penetration of electromagnetic fields into a space, by blocking them with a barrier made of conductive material that has the property of conducting an electric current.