intransitive verb

1. to give off a bright light as a result of great heat; be incandescent or red-hot
2. to give out a steady, even light without flame or blaze
3. to be or feel hot; give out heat
4. to radiate health or high spirits
5. to be elated or enlivened by emotion to glow with pride
6. to show brilliant, conspicuous colors; be bright; specif.,
   1. to be flushed, as from emotion, enthusiasm, etc.; be rosy or ruddy
   2. to gleam; flash; light up: said of the eyes
   3. to be bright or luminescent: said of colors

Etymology: ME glowen < OE glowan, akin to Ger glühen < IE *ghlō- < base *ĝhel-, to shine > gold, gleam, yellow, Gr chlōros, light green

noun

1. a light given off as the result of great heat; incandescence
2. steady, even light without flame or blaze
3. brilliance, vividness, or luminescence of color
4. brightness of skin color, as from good health, emotion, etc.; flush
5. a sensation of warmth and well-being
6. warmth of emotion; ardor, eagerness, etc.