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[bril-yuh n-see] /ˈbrɪl yən si/
noun, plural brilliancies for 1.
an instance of brilliance:
the brilliancies of Congreve's wit.
Origin of brilliancy
1740-50; brilli(ant) + -ancy
Related forms
overbrilliancy, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for brilliancy
  • The incomparable brilliancy of its diction and versification are merits which, to be acknowledged, need only to be mentioned.
  • He is shrewd and sagacious and almost tiresomely in earnest, and this is his principal brilliancy.
  • Literature and taste, indeed, still disguised with a flush of hectic loveliness and brilliancy the ravages of an incurable decay.
  • Before ten o'clock the sky became filled with clouds, and the brilliancy of the morning gave place to darkness and gloom.
  • From this sketch you do not get any idea of his bravery brilliancy and of his complete consummate soldierly qualities.
  • If the spray be coarse, the rods are stouter and capped by pearly heads of lustrous brilliancy.
  • Unmindful of the occasional flights of brilliancy on the part of his opponent.
  • The earlier arrivals had taken their leave, and much of tho brilliancy of tho reception rooms had departed.
  • The numerous flags on the public and private buildings added much to the brilliancy of the occasion.
British Dictionary definitions for brilliancy


great brightness; radiance
excellence or distinction in physical or mental ability; exceptional talent
splendour; magnificence: the brilliance of the royal court
(physics) a former term for luminance
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 brilliancy

1747; see brilliant + -cy. Also cf. brilliance.

Online Etymology Dictionary, © 2010 Douglas Harper
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