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[rey-dee-uh ns] /ˈreɪ di əns/
radiant brightness or light:
the radiance of the tropical sun.
warm, cheerful brightness:
the radiance of her expression.
Rare. radiation.
Also, radiancy.
Origin of radiance
1595-1605; radi(ant) + -ance
Related forms
nonradiance, noun
subradiance, noun
superradiance, noun
1. resplendence, splendor, brilliance. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for radiance
  • Ammons's poems there is an offbeat, sideways, unpredictable radiance.
  • He found in their lives a radiance that, paradoxically, he captured in shadows and dark hues.
  • The extra radiance can last from a few days to a year.
  • It is lighted neither by window nor by lamp, yet it is filled with a soft radiance.
  • At night the eye is not distracted by the radiance of gilded domes.
  • Wendy will be missed by all who where touched by her radiance.
  • The lunar radiance casts a moonbow through the thin clouds of a mackerel sky.
  • The conclusion is suffused with whitewashed radiance and the swell of an organ.
  • She derived enormous pleasure from the radiance she created after she left the world of finance.
  • The chapel walls are clothed in a panoply of colored marbles while its ceiling dissolves in a burst of heavenly radiance.
British Dictionary definitions for radiance


noun (pl) -ances, -ancies
the quality or state of being radiant
a measure of the amount of electromagnetic radiation leaving or arriving at a point on a surface. It is the radiant intensity in a given direction of a small element of surface area divided by the orthogonal projection of this area onto a plane at right angles to the direction Le
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for radiance

c.1600, "brilliant light," from radiant or else from Medieval Latin radiantia "brightness," from radiare "to beam, shine" (see radiation). Figurative use from 1761. Related: Radiancy.

Online Etymology Dictionary, © 2010 Douglas Harper
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radiance in Medicine

radiance ra·di·ance (rā'dē-əns) or ra·di·an·cy (-ən-sē)

  1. The quality or state of being radiant.

  2. The radiant energy emitted per unit time in a specified direction by a unit area of an emitting surface.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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