/ Dictionary / Index A atonicity: Meaning and Definition of Find definitions for: at•o•nic•i•ty Pronunciation: (at"n-is'i-tē, ā"tō-nis'-), [key] — n. Pathol. lack of tone; atony. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: atonicity (Thesaurus) atonic atony Related Content Daily Word Quiz: pristine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language