We found 15 dictionaries that define the word vowels:

General (11 matching dictionaries)

1. vowels: Merriam-Webster
2. vowels: Collins English Dictionary
3. vowels: Vocabulary.com
4. Vowels, vowels: Wordnik
5. vowels: Cambridge Advanced Learner's Dictionary
6. vowels: Wiktionary
7. vowels: Dictionary.com
8. vowels: Cambridge Essential American English Dictionary
9. Vowels: Wikipedia, the Free Encyclopedia
10. Vowels: Rhymezone
11. Vowels: TheFreeDictionary.com

Art (1 matching dictionary)

12. Vowels: Glossary of English Grammar Terms

Computing (1 matching dictionary)

13. Vowels: Encyclopedia

Medicine (1 matching dictionary)

14. Vowels: Medical dictionary

Slang (1 matching dictionary)

15. vowels: Urban Dictionary

(Note: See vowel as well.)

Definitions from WordNet (Vowels) ▸ name:  A surname (common: 1 in 100000 families; popularity rank in the U.S.: #16684) Opposite: consonants, non-vowels, obstruents Phrases: short vowels, front vowels, back vowels, nasal vowels, open vowels, more... Adjectives: long, short, high, back, final, nasal, front, different, english, unstressed, low ▸ Words similar to vowels ▸ Usage examples for vowels ▸ Idioms related to vowels ▸ Wikipedia articles (New!) ▸ Words that often appear near vowels ▸ Rhymes of vowels ▸ Invented words related to vowels