The definition of vacuous is empty or not intelligent. An example of vacuous is a ditzy person who has no smart or useful ideas. Having or showing lack of intelligence, interest, or thought; stupid; senseless; inane.

What does it mean when someone is vacuous?

1 : emptied of or lacking content. 2 : marked by lack of ideas or intelligence : stupid, inane a vacuous mind a vacuous movie. 3 : devoid of serious occupation : idle.

What does morally vacuous mean?

Lacking intelligence; stupid or empty-headed.