/ Dictionary / Index I Ieyasu: Meaning and Definition of Find definitions for: I•e•ya•su Pronunciation: (ē'ye-yä's), [key] — n. Iyeyasu. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. -ier if Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language