adjective vac·u·ous \ˈva-kyə-wəs\

: having or showing a lack of intelligence or serious thought : lacking meaning, importance, or substance

Full Definition of VACUOUS

:  emptied of or lacking content
:  marked by lack of ideas or intelligence :  stupid, inane <a vacuous mind> <a vacuous movie>
:  devoid of serious occupation :  idle
vac·u·ous·ly adverb
vac·u·ous·ness noun

Examples of VACUOUS

  1. a dull and vacuous movie
  2. He had a vacuous expression on his face.

Origin of VACUOUS

Latin vacuus
First Known Use: circa 1660


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