/ Dictionary / Index D Deimos: Meaning and Definition of Find definitions for: Dei•mos Pronunciation: (dī'mos), [key] — n. an ancient Greek personification of terror, a son of Ares and Aphrodite. one of the two moons of Mars. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: deimos (Thesaurus) deil deindex Related Content Daily Word Quiz: lyceum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language