/ Dictionary / Index D diachrony: Meaning and Definition of Find definitions for: di•ach•ro•ny Pronunciation: (dī-ak'ru-nē), [key] — pl. -nies. a diachronic approach to language study. change or development in a linguistic system over a period of time. historical change. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: diachrony (Thesaurus) diachronic linguistics diachylon Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language