verb (v)

• make more cheerful(verb.emotion)

  Example:
  The conversation lightened me up a bit.
  

  Synonym:
  buoy up, lighten up
  Antonym:
  weigh down, weigh on
  

  source: wordnet30
• reduce the weight on; make lighter(verb.contact)

  Example:
  She lightened the load on the tired donkey.
  

  source: wordnet30
• become more cheerful(verb.communication)

  Example:
  After a glass of wine, he lightened up a bit.
  

  source: wordnet30
• make lighter or brighter(verb.change)

  Synonym:
  brighten, illume, illuminate, illumine, light, light up, lighten up
  

  source: wordnet30
• become lighter(verb.change)

  Example:
  The room lightened up.
  

  Synonym:
  lighten up
  Antonym:
  darken
  

  source: wordnet30
• alleviate or remove (pressure or stress) or make less oppressive(verb.change)

  Example:
  Lighten the burden of caring for her elderly parents.
  

  Synonym:
  relieve
  

  source: wordnet30
• To descend; to light.(verb)

  source: webster1913
• To burst forth or dart, as lightning; to shine with, or like, lightning; to display a flash or flashes of lightning; to flash.(verb)

  source: webster1913
• To make light or clear; to light; to illuminate; as, to lighten an apartment with lamps or gas; to lighten the streets.(verb)

  source: webster1913
• To make lighter, or less heavy; to reduce in weight; to relieve of part of a load or burden; as, to lighten a ship by unloading; to lighten a load or burden.(verb)

  source: webster1913