[see -ING2.] Becoming or making bright. lit. and fig.
1725. Pope, Odyss., IV. 346. Each brightning grace the genuine Greek confessed.
1810. Southey, Kehama, XXII. xi. A smile Dawnd in his brightening countenance.
1860. Tyndall, Glac., I. § 11. 75. Clear and sharp against the brightening sky.
1884. Athenæum, 1 March, 272/3. The pecuniary position of Charles [II.] was hardly adequate to his otherwise brightening prospects.