Definition

1. Adjective:
   • Empty of meaning, intelligence, or serious thought: Describes something that is lacking substance, significance, or intellectual content.
   • Empty of matter or expression: Describes a physical space that is void or a facial expression that is blank and unintelligent.

Examples of Usage

• Adjective:
  • The politician's speech was full of vacuous promises. (The politician's speech was full of empty, meaningless promises.)
  • After the long meeting, she had a vacuous stare, as if her mind was completely blank. (After the long meeting, she had an empty, expressionless stare.)
  • The critic dismissed the film as vacuous entertainment. (The critic dismissed the film as empty, unintelligent entertainment.)

Advanced Usage

• "Vacuous truth" (Logic/Philosophy): In formal logic, a statement that is true simply because it does not assert anything about its subject. For example, the statement "All unicorns can fly" is considered vacuously true because there are no unicorns.
  • The theorem holds under a vacuous condition, as the set in question is empty.
• "Vacuous existence": A life or state perceived as empty, purposeless, or devoid of meaningful activity.
  • He felt trapped in a vacuous existence, going through the motions every day.

Variants and Related Words

• Vacuity (noun): The state of being vacuous; emptiness of mind, expression, or content.
  • The vacuity of the argument was apparent to everyone.
• Vacuously (adverb): In a vacuous manner.
  • He smiled vacuously, not understanding the question.

Synonyms

• Empty: Lacking content or substance.
• Inane: Silly; stupid.
• Blank: Showing no understanding or expression.
• Hollow: Without real significance or value.
• Mindless: Acting without thought or intelligence.

Antonyms

• Meaningful: Having a serious, important, or useful quality.
• Profound: Having deep insight or meaning.
• Expressive: Effectively conveying thought or feeling.
• Intelligent: Having or showing intelligence.

Related Idioms and Phrases

• A vacuous smile/look/expression: A smile or look that appears empty, blank, or unintelligent.
  • She greeted us with a vacuous smile, her thoughts clearly elsewhere.
• Vacuous chatter/comments: Talk or remarks that are empty, trivial, or silly.
  • The room was filled with the vacuous chatter of socialites.

Adjective

1. void of expression
   • a blank stare
2. devoid of matter
   • a vacuous space
3. devoid of significance or point
   • empty promises
   • a hollow victory
   • vacuous comments
4. devoid of intelligence