frivolousness

/ˈfrɪvələsnəs/
noun
  1. The quality of being silly, trivial, or not serious.
    • His frivolousness annoyed his boss, who wanted a serious report.
    • The frivolousness of the TV show made it perfect for relaxing after a hard day.
    • The party was full of the kind of frivolousness that makes you forget your worries.
Antonyms
What does "frivolousness" mean? | whatsthatwordmean | whatsthatwordmean