Synonyms: empty-headed, featherbrained, giddy, light-headed, lightheaded, dizzy, silly, airheaded
Definition: lacking seriousness; given to frivolity
Usage: a dizzy blonde; light-headed teenagers; silly giggles
Similar words: frivolous
Definition: not serious in content or attitude or behavior
Usage: a frivolous novel; a frivolous remark; a frivolous young woman
Synonyms: dizzy, giddy, woozy, vertiginous
Definition: having or causing a whirling sensation; liable to falling
Usage: had a dizzy spell; a dizzy pinnacle; had a headache and felt giddy; a giddy precipice; feeling woozy from the blow on his head; a vertiginous climb up the face of the cliff
Definition: affected by an impairment of normal physical or mental function
Usage: ill from the monotony of his suffering