- noun the corruption of data due to nearby electrically generated magnetic fields.
- An electromagnetic disturbance which brings about a degradation in performance, a malfunction, or the failure of a device, piece of equipment, or system. electromagnetic interference can be produced by countless sources, such as microchips, lightning, power lines, and radio frequency signals. Devices such as shields and filters are utilized to minimize or prevent its effects. Its abbreviation is EMI. When occurring in radio-frequencies, also called RF interference.