noun
: a combination of musical tones sounded together each of which is a scale degree apart from one or two neighboring tones in the group
C-D-E struck simultaneously are a tone cluster
noun
: a combination of musical tones sounded together each of which is a scale degree apart from one or two neighboring tones in the group
C-D-E struck simultaneously are a tone cluster
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012