Adjective has 2 senses

• light-headed(s = adj.all) faint, light, lightheaded, swooning - weak and likely to lose consciousness; "a swooning fit"; "felt light in the head"; "light-headed from lack of sleep"; "light-headed with wine"; "suddenly felt faint from the pain"; "was sick and faint from hunger"


• light-headed(s = adj.all) airheaded, dizzy, empty-headed, featherbrained, giddy, lightheaded, silly - lacking seriousness; given to frivolity; "a dizzy blonde"; "light-headed teenagers"; "silly giggles"