<p><strong>Noun:</strong></p><ul><li>Phonetics.</li><li>A speech sound produced without occluding, diverting, or obstructing the flow of air from the lungs (consonant).</li><li>In a syllable, the sound of greatest sonority, as "i" in "grill."</li><li>A concept empirically determined as a phonological element in structural contrast with consonant, as the "(ē)" of "be" (bē), "we" (wē), and "yeast" (yēst).</li><li>A letter representing or usually representing a vowel, as in English, "a," "e," "i," "o," "u," and sometimes "w" and "y."</li></ul><p><strong>Adjective:</strong></p><ul><li>Of or relating to a vowel.</li></ul>