[see prec. and -ANCY.]

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  The quality of being brilliant; shining quality, lustrousness; shining brightness. a. physical.

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1747.  Hervey, Medit. & Contempl. (1818), 89. It … throws a brilliancy into the water of the diamond that is hardening on its rock.

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1755.  in Johnson.

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1772.  Pennant, Tours Scotl. (1774), 323. An amazing brilliancy of colors.

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1856.  Ruskin, Mod. Paint., IV. V. x. § 3. 125. The apparent connection of brilliancy of colour with vigour of life, or purity of substance.

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1878.  Huxley, Physiogr., 75. This brilliancy is rapidly lost … on exposure to the atmosphere.

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  b.  non-material.

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1796.  Burke, Regic. Peace, Wks. VIII. 398. What new brilliancy then does it throw over the prospect.

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1842.  Miss Mitford, in L’Estrange, Life, III. ix. 157. She is full of life, and spirit, and brilliancy.

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1850.  Merivale, Rom. Emp. (1865), I. ii. 69. The consciousness of deserved popularity added brilliancy to his wit.

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1864.  Sat. Rev., 475/1. Brilliancy and shallowness are commonly received synonyms. The best device for exciting the most solemn distrust is to accuse a man of brilliance.

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  c.  with plural.

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1858.  Hawthorne, Fr. & It. Jrnls., II. 96. Its concentrated brilliancies and magnificences. Ibid. (1868), Amer. Note-bks. (1879), II. 145. The autumnal brilliancies.

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