vowel
/ˈvaʊəl/
noun
- A speech sound made with the vocal cords vibrating and without any obstruction of the airflow in the mouth; a letter representing such a sound (A, E, I, O, U, and sometimes Y).
- Every syllable must contain at least one vowel.
- The English vowels are A, E, I, O, and U.
- She had trouble pronouncing the vowel in 'cat'.
Antonyms