Longman Dictionary of Contemporary English
The Collaborative International Dictionary
empty-headed \empty-headed\ adj. lacking seriousness; given to frivolity.
Syn: airheaded, dizzy, featherbrained, giddy, lightheaded, light-headed, silly.
Wiktionary
a. silly and lacking sense or discretion; featherbrained or scatterbrained
WordNet
adj. lacking seriousness; given to frivolity; "a dizzy blonde"; "light-headed teenagers"; "silly giggles" [syn: airheaded, dizzy, featherbrained, giddy, light-headed, lightheaded, silly]
Usage examples of "empty-headed".
Some folk thought that fauns and nymphs were empty-headed creatures, incapable of feeling or commitment, but those folk were confusing types.
How can we care about a man who throws away his life for an empty-headed doll like Selina Denton whose personality appeals to men satisfied with women whose breasts and rear are extravagantly rounded in the cliché style of male chauvinistic fantasy?
That it was also a society that mindlessly embraced the concept of the empty symbol, whether it be in the form of rabid name-brand consumerism or idolization of an empty-headed pop-star's pretty face, lent added poignancy to the stylized dolour of its ultra-modern facade.
He was a painfully honest man, she realized, as he had proved several times during the meal by stating his disagreement with some particularly empty-headed notion the interior decorator had proposed.
But actually they're just a bunch of empty-headed preppies who wouldn't even be here if their parents hadn't sent them to expensive schools.