Pronunciation: (bril'yuns), [key]
1. great brightness; luster: the brilliance of a fine diamond.
2. excellence or distinction; conspicuous talent, mental ability, etc.
3. splendor, elegance, or magnificence: the brilliance of the court of Louis XIV.
4. Optics.that luminance of a body consisting of its saturation and brightness.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.