1. （因生病、醉酒等而）头晕目眩的
If you feel light-headed, you feel rather unsteady and strange, for example because you are ill or because you have drunk too much alcohol.

1. lacking seriousness
given to frivolity

e.g. a dizzy blonde
light-headed teenagers
silly giggles

Synonym: airheadeddizzyempty-headedfeatherbrainedgiddylightheadedsilly

2. weak and likely to lose consciousness

e.g. 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

Synonym: faintlightswooninglightheaded