1. The plural of polytonality; the simultaneous use of two or more musical keys or tonal centers in a composition.
Usage: music; technical

Examples

• The composer explored polytonalities by layering melodies in different keys simultaneously.
• Modern classical music often employs polytonalities to create complex harmonic textures.
• Stravinsky's works demonstrate innovative uses of polytonalities in twentieth-century composition.
• Students of advanced music theory study polytonalities as a technique for expanding tonal possibilities.
• The piece's polytonalities create an unsettling yet intriguing sonic landscape.