/ Dictionary / Index D dieback: Meaning and Definition of Find definitions for: die•back Pronunciation: (dī'bak"), [key] — n. Plant Pathol. a condition in a plant in which the branches or shoots die from the tip inward, caused by any of several bacteria, fungi, or viruses or by certain environmental conditions. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: dieback (Thesaurus) die dieb. alt. Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language