Webster's Revised Unabridged Dictionary · 1913

Vowel

Vowel , noun

[French voyelle, or an Old French form without y, Latin vocalis (sc. littera), from vocalis sounding, from vox, vocis, a voice, sound. See Vocal.]

(Phonetics) A vocal, or sometimes a whispered, sound modified by resonance in the oral passage, the peculiar resonance in each case giving to each several vowel its distinctive character or quality as a sound of speech; -- distinguished from a consonant in that the latter, whether made with or without vocality, derives its character in every case from some kind of obstructive action by the mouth organs. Also, a letter or character which represents such a sound. See Guide to Pronunciation, §§ 5, 146-149.

In the English language, the written vowels are a, e, i, o, u, and sometimes w and y. The spoken vowels are much more numerous.

Collocations (2)
Close vowel , See under Close, a.
Vowel point , See under Point, n.

Vowel , adjective

Of or pertaining to a vowel; vocal.