/ Dictionary / Index E electromagnetic wave: Meaning and Definition of Find definitions for: elec'tromagnet'ic wave' Pronunciation: [key] — Physics. Physics. a wave produced by the acceleration of an electric charge and propagated by the periodic variation of intensities of, usually, perpendicular electric and magnetic fields. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. electromagnetic unit electromagnetism Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language