Pronunciation: (fō-nā'shun), [key]
1. rapid, periodic opening and closing of the glottis through separation and apposition of the vocal cords that, accompanied by breath under lung pressure, constitutes a source of vocal sound.
2. (not in technical use) voice; vocalization. Cf. voice (defs. 15, 16).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.