any one of eight primary, purportedly invariant, sustained vowel sounds that constitute a reference set for describing the vowel inventory of a language.
any one of the eight or more supplementary or secondary cardinal vowels.
Are There Any Words That Use “W” As A Vowel?A, E, I, O, U, and sometimes Y ... and W? Yes, the letter W can behave as a vowel. It's time to level up your Scrabble game, people. And, to all our grade-school peeps out there, get ready to knock the socks off your Spelling teacher.
Origin of cardinal vowel
First recorded in 1920–25
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019