frivolity

1 ENTRIES FOUND:
frivolity /frɪˈvɑːləti/ noun
plural frivolities
frivolity
/frɪˈvɑːləti/
noun
plural frivolities
Britannica Dictionary definition of FRIVOLITY
1 
[noncount] : a lack of seriousness : the quality or state of being silly or frivolous
2 
[count] : something that is unnecessary or silly