/ Dictionary / Index A atony: Meaning and Definition of Find definitions for: at•o•ny Pronunciation: (at'n-ē), [key] — n. lack of tone or energy; muscular weakness, esp. in a contractile organ. lack of stress accent. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: atony (Thesaurus) atonicity atop Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language