Definition

1. Noun:
   • The quality or state of radiating light; brightness or light emitted or reflected. This refers to a glowing, shining light, often with a sense of warmth or beauty.
   • Great happiness or health apparent in a person's appearance. This refers to a glowing quality of joy, vitality, or well-being that seems to shine from a person.
   • (Physics) The flux of radiation emitted per unit solid angle in a given direction by a unit area of a source. This is a technical term for a measurable amount of electromagnetic energy.

Usage and Examples

• Referring to light:

  • The radiance of the full moon lit the path.
  • The diamond sparkled with an inner radiance.

• Referring to happiness or health:

  • Her face was filled with radiance on her wedding day.
  • After the good news, a radiance seemed to surround him.

• Referring to physics:

  • Scientists measured the spectral radiance of the star.

Advanced Usage

• "In all its/their radiance": used to emphasize the full, brilliant display of something.
  • The palace was restored, displayed once more in all its radiance.

Variants and Related Words

• Radiant (adjective): sending out light; shining brightly. Also used to describe a person who is glowing with happiness or health.
  • She gave a radiant smile.
• Radiancy (noun): a less common synonym for radiance.
• Irradiance (noun): a related physics term for the power of electromagnetic radiation per unit area incident on a surface.

Synonyms

• Light: The natural agent that makes things visible.
• Brightness: The quality or state of giving out or reflecting light.
• Luminosity: The intrinsic brightness of a celestial object.
• Glow: A steady radiance of light or heat.
• Beam: A ray or shaft of light.

Antonyms

• Dullness: Lack of brightness or shine.
• Gloom: Partial or total darkness.
• Dimness: The state of being poorly lit.

Idioms and Phrases

• "Aura of radiance": a distinctive atmosphere or quality of glowing light or happiness that seems to surround a person or thing.
  • The spiritual leader had an aura of radiance that calmed everyone.

Noun

1. an attractive combination of good health and happiness
   • the radiance of her countenance
2. the quality of being bright and sending out rays of light
3. the amount of electromagnetic radiation leaving or arriving at a point on a surface