adj.
      - giving out much light, or filled with light.
 - (of colour) vivid and bold.
 - intelligent and quick-witted.
 - cheerfully lively.
 - (of prospects) good.
 - (of sound) clear and typically high-pitched.
 
n.
 
(
brights)
 
N. Amer. headlights switched to full beam.
 
  Phrase
  
    - bright and early
 very early in the morning.  - 
(as)
 bright as a button
 informal intelligently alert and lively.  - bright-eyed and bushy-tailed
 informal alert and lively.  - look on the bright side
 be optimistic or cheerful in spite of difficulties. 
   
  Derivative
  
    - brighten v.
  - brightish adj.
  - brightly adv.
  - brightness n.
 
   
  Etymology
  OE beorht, of Gmc origin.