lev·i·ty\ˈle-və-tē\
noun
: a lack of seriousness
: an amusing quality
Full Definition
1 : excessive or unseemly frivolity
2 : lack of steadiness : changeableness
Examples
the teachers disapprove of any displays of levity during school assemblies
Origin: Latin levitat-, levitas, from levis light in weight — more at light.
First use: 1564
Synonyms: facetiousness, flightiness, flippancy, frivolousness, frothiness, frivolity, light-headedness, light-mindedness, lightness, silliness