/ Dictionary / Index D Darius I: Meaning and Definition of Find definitions for: Da•ri•us I Pronunciation: (du-rī'us), [key] — (Darius Hystaspes) (“the Great”) 558?–486? b.c., king of Persia 521–486. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. dariole Darius II Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language