tonality

Short definition from Wiktionary

Noun

1. 1
   The system of seven tones built on a tonic key; the 24 major and minor scales.
2. 2
   A sound of specific pitch and quality; timbre.
3. 3
   The quality of all the tones in a composition heard in relation to the tonic.
4. 4
   The interrelation of the tones in a painting.