1.Definition: an attractive combination of good health and happiness

"The radiance of her countenance"

Category: General

2.Definition: the amount of electromagnetic radiation leaving or arriving at a point on a surface

Related Noun(s):glow

Category: General

3.Definition: the quality of being bright and sending out rays of light

Related Noun(s):effulgence, radiancy, refulgence, refulgency, shine

Category: General