We found 12 dictionaries that define the word tone cluster:

General (10 matching dictionaries)

1. tone cluster: Merriam-Webster
2. tone cluster: Oxford Learner's Dictionaries
3. tone cluster: American Heritage Dictionary of the English Language
4. tone cluster: Collins English Dictionary
5. tone cluster: The Wordsmyth English Dictionary-Thesaurus
6. tone cluster: Infoplease Dictionary
7. tone cluster: Dictionary.com
8. Tone cluster: Wikipedia, the Free Encyclopedia
9. tone cluster: TheFreeDictionary.com
10. tone cluster: Wiktionary

Art (2 matching dictionaries)

11. Essentials of Music (No longer online)
12. Virginia Tech Multimedia Music Dictionary (No longer online)

Definitions from Wiktionary (tone cluster) ▸ noun:  A chord comprising at least three adjacent tones in a scale. ▸ Words similar to tone cluster ▸ Usage examples for tone cluster ▸ Idioms related to tone cluster ▸ Wikipedia articles (New!) ▸ Words that often appear near tone cluster ▸ Rhymes of tone cluster ▸ Invented words related to tone cluster