Read the dictionary definition of lightheaded. All definitions for this word.
1. lacking seriousness; given to frivolity
1. a dizzy blonde
2. light-headed teenagers
3. silly giggles
2. weak and likely to lose consciousness
1. suddenly felt faint from the pain
2. was sick and faint from hunger
3. felt light in the head
4. a swooning fit
5. light-headed with wine
6. light-headed from lack of sleep