affected with vertigo; dizzy.

attended with or causing dizziness

a giddy climb.

frivolous and lighthearted; impulsive; flighty

a giddy young person.

to make or become giddy.

adjective

calm , careful , level-headed , sensible , serious

adjective

bemused , brainless , bubbleheaded , capricious , careless , changeable , changeful , ditzy , dizzy , empty-headed * , erratic , fickle , flighty * , flustered , frivolous , gaga , heedless , inconstant , irresolute , irresponsible , lightheaded * , punchy * , reckless , reeling , scatterbrained * , skittish * , slaphappy * , swimming * , thoughtless , unbalanced , unsettled , unstable , unsteady , vacillating , volatile , whimsical , whirling , wild , woozy * , lightheaded , vertiginous , woozy , dizzying , empty-headed , featherbrained , flighty , frothy , harebrained , lighthearted , scatterbrained , silly , exuberant , gyratory , heady , light-headed , mercurial