having or causing a whirling sensation; liable to falling; 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

[ Syn: dizzy , woozy , vertiginous ]

lacking seriousness; given to frivolity; a dizzy blonde; light-headed teenagers; silly giggles

[ Syn: airheaded , dizzy , empty-headed , featherbrained , light-headed , lightheaded , silly ]