Pronunciation: (shwä), [key]
1. the mid-central, neutral vowel sound typically occurring in unstressed syllables in English, however spelled, as the sound of a in alone and sofa, e in system, i in easily, o in gallop, u in circus.
2. the phonetic symbol u, used to represent this sound. Also,shwa.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.