WordReference Random House Unabridged Dictionary of American English © 2026
a•ton•al•ism
(ā tōn′l iz′əm),USA pronunciation n. [Music.]
a•ton′al•ist, n.
- Music and Danceatonality.
- Music and Dancea note, phrase, etc., that seems harsh or discordant.
- atonal + -ism 1925–30