We found 33 dictionaries that define the word clef:

General (27 matching dictionaries)

1. clef: Merriam-Webster
2. clef: Oxford Learner's Dictionaries
3. clef: American Heritage Dictionary of the English Language
4. clef: Collins English Dictionary
5. clef: Vocabulary.com
6. Clef, clef: Wordnik
7. clef: Cambridge Advanced Learner's Dictionary
8. Clef: InfoVisual Visual Dictionary
9. clef: Wiktionary
10. clef: Webster's New World College Dictionary, 4th Ed.
11. clef: The Wordsmyth English Dictionary-Thesaurus
12. clef: Infoplease Dictionary
13. Clef, clef: Dictionary.com
14. clef: Online Etymology Dictionary
15. clef: Cambridge Essential American English Dictionary
16. Clef (disambiguation), Clef: Wikipedia, the Free Encyclopedia
17. Clef: Online Plain Text English Dictionary
18. clef: Webster's Revised Unabridged, 1913 Edition
19. clef: Rhymezone
20. Clef, clef (f): AllWords.com Multi-Lingual Dictionary
21. clef: Webster's 1828 Dictionary
22. clef: FreeDictionary.org
23. clef: Mnemonic Dictionary
24. clef: TheFreeDictionary.com
25. clef: Longman Dictionary of Contemporary English

Art (1 matching dictionary)

26. Virginia Tech Multimedia Music Dictionary (No longer online)

Computing (1 matching dictionary)

27. clef: Encyclopedia

Miscellaneous (1 matching dictionary)

28. CLEF: Acronym Finder

Slang (1 matching dictionary)

29. Clef: Urban Dictionary

Tech (2 matching dictionaries)

30. Rane Professional Audio Reference (No longer online)
31. Sweetwater Music (No longer online)

(Note: See clefs as well.)

Definitions from Wiktionary ( ) ▸ noun:  (music) A symbol found on a musical staff that indicates the pitches represented by the lines and the spaces on the staff [from 16th c.] Similar: cleff, C clef, alto clef, bass clef, viola clef, neutral clef, bass, note, space, sharp, more... Opposite: line, space, staff Types: treble clef, bass clef, alto clef, tenor clef, percussion clef, mezzo-soprano clef, baritone clef, sub-bass clef, more... Phrases: treble clef, bass clef, tenor clef, alto clef, soprano clef, more... Adjectives: treble, roman, french, soprano, musical, usual, tenor, appropriate, double, wrong, neutral ▸ Word origin ▸ Words similar to clef ▸ Usage examples for clef ▸ Idioms related to clef ▸ Wikipedia articles (New!) ▸ Popular adjectives describing clef ▸ Words that often appear near clef ▸ Rhymes of clef ▸ Invented words related to clef