/ Dictionary / Index D Dyak: Meaning and Definition of Find definitions for: Dy•ak Pronunciation: (dī'ak), [key] — n. Dayak. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. dyadic system dyarchy Related Content Daily Word Quiz: impetuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language