/ Dictionary / Index E energy band: Meaning and Definition of Find definitions for: en'ergy band" Pronunciation: [key] — Physics. Physics. band (def. 10). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. energy audit energy efficiency ratio Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language