polytonality

== English == === Etymology === From poly- + tonality. === Noun === polytonality (countable and uncountable, plural polytonalities) (music) The use of multiple keys in the same composition, especially by multiple instruments at the same time ==== Synonyms ==== polyharmony ==== Related terms ==== bitonality (using precisely two keys) polyvalence (use of more than one harmonic function in one key)