/ Dictionary / Index H hiero-: Meaning and Definition of Find definitions for: hiero- Pronunciation: [key] a combining form meaning “sacred,” “priestly,” used in the formation of compound words: hierocracy. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hieratic hierocracy Related Content Daily Word Quiz: procrastinate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language