Bright·en, v. t. [imp. & p. p. Brightened p. pr. & vb. n. Brightening.]
  Note: [From Bright, a.]
  1. To make bright or brighter; to make to shine; to increase the luster of; to give a brighter hue to.
  2. To make illustrious, or more distinguished; to add luster or splendor to.
     The present queen would brighten her character, if she would exert her authority to instill virtues into her people.   --Swift.
  3. To improve or relieve by dispelling gloom or removing that which obscures and darkens; to shed light upon; to make cheerful; as, to brighten one's prospects.
  An ecstasy, which mothers only feel,
  Plays round my heart and brightens all my sorrow.   --Philips.
  4. To make acute or witty; to enliven.