DICT.TW Dictionary Taiwan

 Light·en v. i. [imp. & p. p. Lightened p. pr. & vb. n. Lightening.]
 1. To burst forth or dart, as lightning; to shine with, or like, lightning; to display a flash or flashes of lightning; to flash.
 This dreadful night,
 That thunders, lightens, opens graves, and roars
 As doth the lion.   --Shak.
 2. To grow lighter; to become less dark or lowering; to brighten; to clear, as the sky.