/ Dictionary / Index A atonalism: Meaning and Definition of Find definitions for: a•ton•al•ism Pronunciation: (ā-tōn'l-iz"um), [key] — n. Music. atonality. a note, phrase, etc., that seems harsh or discordant. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: atonalism (Thesaurus) atonal atonality 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