ˈfriv(ə)ləs adjective
Etymology: Middle English, from Latin frivolus, probably from friare to rub, crumble — more at friction
1. : of little weight or importance : having no basis in law or fact : light , slight , sham , irrelevant , superficial
the procedure encourages frivolous cases — David Fellman
is it not possible to screen out frivolous charges — A.F.Westin
a frivolous argument
2. : given to trifling or unbecoming levity : not grave or serious in demeanor, purpose, or acts : light-minded
as frivolous as his eldest son — C.H.Sykes
she spends … too much time at soda fountains … it makes her appear frivolous — Ellen Glasgow
the … frivolous existence of a public official mingling in corrupt social circles — Encyc. Americana
: not serious or practical (as in content or form) : light , gay , playful
this letter is, on the whole, frivolous in its temper — Irving Kristol
some frivolous lapel pins … in the form of heads of young girls — New Yorker
• friv·o·lous·ly adverb