to·nal·i·ty 
(tō-nălĭ-tē)
(tō-nălĭ-tē)n. pl. to·nal·i·ties
1. Music
a. A system or arrangement of seven tones built on a tonic key.
b. The arrangement of all the tones and chords of a composition in relation to a tonic.
2. The scheme or interrelation of the tones in a painting.