/ Dictionary / Index D defiber: Meaning and Definition of Find definitions for: de•fi•ber Pronunciation: (dē-fī'bur), [key] — v.t. defibrate. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. defiant defibered 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