We found 4 dictionaries that define the word major keys:

General (4 matching dictionaries)

1. major keys: Merriam-Webster
2. major keys: Collins English Dictionary
3. major keys: Vocabulary.com
4. major keys: Wiktionary

(Note: See major_key as well.)

Definitions from Wiktionary (major key) ▸ noun:  (music) A musical key based upon a major scale. ▸ Also see major_key Phrases: Music written in all major and/or minor keys, more... ▸ Words similar to major keys ▸ Usage examples for major keys ▸ Idioms related to major keys ▸ Wikipedia articles (New!) ▸ Words that often appear near major keys ▸ Rhymes of major keys ▸ Invented words related to major keys