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