/ Dictionary / Index D ditheism: Meaning and Definition of Find definitions for: di•the•ism Pronunciation: (dī'thē-iz"um), [key] — n. the doctrine of or belief in two equally powerful gods. belief in the existence of two independent antagonistic principles, one good and the other evil, as in Zoroastrianism. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. dite dither Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language