light-headed

Adjective

• lacking seriousness; given to frivolity
  • a dizzy blonde
    
  • light-headed teenagers
    
  • silly giggles
    

• weak and likely to lose consciousness
  • suddenly felt faint from the pain
    
  • was sick and faint from hunger
    
  • felt light in the head
    
  • a swooning fit
    
  • light-headed with wine
    
  • light-headed from lack of sleep
    

Related words

• Synonyms: 
  airheaded , dizzy , empty-headed , featherbrained , giddy , lightheaded , silly , faint , light , swooning