/ Dictionary / Index D Dominion Day: Meaning and Definition of Find definitions for: Domin'ion Day" Pronunciation: [key] former name of Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. dominion Dominique Related Content Daily Word Quiz: clairvoyant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language