/ray"dee euhns/ , n.
1. radiant brightness or light: the radiance of the tropical sun.
2. warm, cheerful brightness: the radiance of her expression.
3. Rare. radiation.
Also, radiancy .
[ 1595-1605; RADI(ANT) + -ANCE ]
Syn. 1. resplendence, splendor, brilliance.