1. behavior that is silly or not serious, especially when seriousness is expected
2. something that is trivial or of little importance

Examples

• The teacher was annoyed by the students’ frivolity during the serious discussion.
• His constant frivolity made it hard for colleagues to take him seriously.
• She dismissed the complaint as mere frivolity.
• The meeting was marked by inappropriate frivolity given the circumstances.
• They accused the media of focusing on frivolity instead of real issues.
• Her frivolity seemed out of place at the solemn ceremony.
• The budget cuts eliminated what administrators considered frivolities.