the mind > language > linguistics > study of speech sound > speech sound > vowel > [noun] > system or use of (4)
Linguistics. Cf. vocal, adj. 9, consonantism, n. The set or system of vowels used in a language, dialect, etc.; a vowel system.
A system of vowel-sounds; articulation in respect of vowels.
Mode of pronunciation, esp. of vowel sounds (cf. branch II.). Frequently with modifying adjective.
The pronunciation of vowels in speech.