/ Dictionary / Index A Ancient of Days: Meaning and Definition of Find definitions for: An'cient of Days' Pronunciation: [key] the Supreme Being; God. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Ancient Mystic Order Rosae Crucis ancient regime Related Content Daily Word Quiz: leonine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language