[ad. L. lūciditās, f. lūcid-us LUCID: see -ITY. Cf. F. lucidité.] The quality or condition of being lucid; brightness, luminosity; now chiefly fig. intellectual clearness; transparency of thought or expression.
1656. Blount, Glossogr., Lucidity, brightness.
1664. H. More, Myst. Iniq., 497. Touching the Lucidity of Christ’s Body after his Ascension.
a. 1688. Cudworth, Immut. Mor. (1731), 259. There is indeed a Brightness or Lucidity in the Sun.
1794. G. Adams, Nat. & Exp. Philos., IV. xlix. 346. Light frequently does not sensibly act otherwise than as the cause of lucidity, or of luminous phenomena.
1851. Nichol, Archit. Heav., 253. His precision of language and peculiar lucidity of exposition.
1855. M. Arnold, Resignation, 298. Fate gave, what chance shall not control, His sad lucidity of soul.
1874. Maudsley, Respons. in Ment. Dis., vii. 229. Through their long intervals of lucidity.
1875. H. James, R. Hudson, vi. 200. He looked at him with eyes of such radiant lucidity.
1884. F. Temple, Relat. Relig. & Sci., i. (1885), 10. The question … put by Hume … was handled by him with singular lucidity.
