/ Dictionary / Index D dynast: Meaning and Definition of Find definitions for: dy•nast Pronunciation: (dī'nast, -nustBrit.also din'ast), [key] — n. a ruler or potentate, esp. a hereditary ruler. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: dynast (Thesaurus) dynamotor dynastid Related Content Daily Word Quiz: nonchalant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language