What is the meaning of brilliance?

noun

• A light within the field of vision that is brighter than the brightness to which the eyes are adapted.
  • usage: "a glare of sunlight"
  • synonyms: glare, blaze
• The quality of being magnificent or splendid or grand.
  • usage: "for magnificence and personal service there is the Queen's hotel"; "his `Hamlet' lacks the brilliance that one expects"; "it is the university that gives the scene its stately splendor"; "an imaginative mix of old-fashioned grandeur and colorful art"; "advertisers capitalize on the grandness and elegance it brings to their products"
  • synonyms: magnificence, splendor, splendour, grandeur, grandness
• Unusual mental ability.
  • synonyms: genius