/ Dictionary / Index E E layer: Meaning and Definition of Find definitions for: E layer Pronunciation: [key] the radio-reflective ionospheric layer of maximum electron density, normally found at an altitude between 60 and 75 mi. (100 and 120 km). Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. elative Elazig 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