Is the letter Y a vowel or a consonant?

@vonn1378 (706)
July 18, 2007 10:55pm CST
In terms of sound, a vowel ia a speech sound which is produced by comparatively open configuration of the vocal tract, with vibration of the vocal cords but within audible friction. While a consonant is a basic speech sound in which the breath is at least partly obstructed. So, is it a vowel or consonant?