- 1a speech sound in which the mouth is open and the tongue is not touching the top of the mouth, the teeth, etc., for example/ɑ, ɛ, ɔ/ vowel sounds Each language has a different vowel system. see cardinal vowel
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- 2a letter that represents a vowel sound. In English the vowels are a, e, i, o, and u. compare consonant, diphthong
Check pronunciation: vowel