The brief terminal part of a vowel or vocal element, differing more or less in quality from the main part; as, a as in ale ordinarily ends with a vanish of i as in ill, o as in old with a vanish of oo as in foot.
In phonetics, the faint, final part of certain double vowel sounds, such as the faint "ee" ending of the vowel sound in the word "high" (hah-ee").