What is the meaning of glow?

noun

• An alert and refreshed state.
  • synonyms: freshness
• Light from nonthermal sources.
  • synonyms: luminescence
• The phenomenon of light emission by a body as its temperature is raised.
  • synonyms: incandescence
• A feeling of considerable warmth.
  • usage: "the glow of new love"; "a glow of regret"
• A steady even light without flames.
• The amount of electromagnetic radiation leaving or arriving at a point on a surface.
  • synonyms: radiance, glowing
• An appearance of reflected light.
  • synonyms: gleam, gleaming, lambency

verb

• Emit a steady even light without flames.
  • usage: "The fireflies were glowing and flying about in the garden"
• Have a complexion with a strong bright color, such as red or pink.
  • usage: "Her face glowed when she came out of the sauna"
  • synonyms: beam, radiate, shine
• Shine intensely, as if with heat.
  • usage: "The coals were glowing in the dark"; "The candles were burning"
  • synonyms: burn
• Be exuberant or high-spirited.
  • usage: "Make the people's hearts glow"
• Experience a feeling of well-being or happiness, as from good health or an intense emotion.
  • usage: "She was beaming with joy"; "Her face radiated with happiness"
  • synonyms: beam, radiate, shine