vowel - definition and synonyms

 
noun [countable] 

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/ˈvaʊəl/
singularvowel
pluralvowels
  1. 1
    linguistics a sound that you make when you speak without closing your mouth or throat
  2. 2
    one of the letters ‘a’, ‘e’, ‘i’, ‘o’, or ‘u’, used for representing these sounds. In English, ‘y’ is sometimes considered to be a vowel. The other letters are called consonants.