/ Dictionary / Index D Department of Energy: Meaning and Definition of Find definitions for: Depart'ment of En'ergy Pronunciation: [key] the department of the U.S. federal government that sets forth and maintains the national energy policy, including energy conservation, environmental protection, etc. Abbr.: DOE Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Department of Education Department of Health and Human Services Related Content Daily Word Quiz: winsome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language