1. Phonetics. (in English articulation) a speech sound produced without occluding, diverting, or obstructing the flow of air from the lungs (opposed to consonant). (in a syllable) the sound of greatest sonority, as i in grill.Compare consonant (def 1b). (in linguistic function) a concept empirically determined as a phonological element in structural contrast with consonant, as the (ē) of be (bē), we (wē), and yeast (yēst).
2. a letter representing or usually representing a vowel, as,
"repetitions can be vowel."
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