We found 24 dictionaries that define the word key signature:

General (19 matching dictionaries)

1. key signature: Merriam-Webster
2. key signature: Oxford Learner's Dictionaries
3. key signature: American Heritage Dictionary of the English Language
4. key signature: Collins English Dictionary
5. key signature: Vocabulary.com
6. key-signature: Wordnik
7. key signature: Cambridge Advanced Learner's Dictionary
8. key signature: Wiktionary
9. key signature: The Wordsmyth English Dictionary-Thesaurus
10. key signature: Infoplease Dictionary
11. key signature: Dictionary.com
12. Key signature (cryptography), Key signature: Wikipedia, the Free Encyclopedia
13. key signature: Rhymezone
14. key signature: FreeDictionary.org
15. key signature: Mnemonic Dictionary
16. key signature: TheFreeDictionary.com
17. key signature: Longman Dictionary of Contemporary English

Art (2 matching dictionaries)

18. Essentials of Music (No longer online)
19. Virginia Tech Multimedia Music Dictionary (No longer online)

Computing (1 matching dictionary)

20. key signature: Encyclopedia

Slang (1 matching dictionary)

21. key signature: The Folk File

Tech (1 matching dictionary)

22. Sweetwater Music (No longer online)

(Note: See key_signatures as well.)

Definitions from Wiktionary (key signature) ▸ noun:  (music) An indication of the key of a composition, giving the number of sharps or flats in the corresponding scale. Similar: signature, sharp, C-sharp major, key change, A major, E major, B major, home key, keynote, segno, more... Types: major, minor, augmented, diminished, harmonic minor, melodic minor, more... Phrases: Key signature names and translations, more... Adjectives: sharp, si, sol, flat, moll, natural, caged, major, la, ta, dominant ▸ Words similar to key signature ▸ Usage examples for key signature ▸ Idioms related to key signature ▸ Wikipedia articles (New!) ▸ Words that often appear near key signature ▸ Rhymes of key signature ▸ Invented words related to key signature