nounpl. a·to·nal·i·ties Music
- The absence of a tonal center and of harmonies derived from a diatonic scale corresponding to such a center; lack of tonality.
- A style of composition that lacks such a tonal center and its derived harmonies.
(countable and uncountable, plural atonalities)
- (uncountable, music) A style of music that is written without a key.
- (countable, music) A passage written without a key.