lightheaded
1. [ adjective ] weak and likely to lose consciousness
Synonyms: faint light-headed swooning light
Examples:

"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 terms: ill
2. [ adjective ] lacking seriousness; given to frivolity
Synonyms: light-headed silly dizzy giddy featherbrained empty-headed airheaded
Examples:

"a dizzy blonde" "light-headed teenagers" "silly giggles"

Related terms: frivolous
Similar spelling:   light-headed
  light-headedly
  Light_Within
  lightwood