|1.||Of little weight or importance; not worth notice; slight; |
|2.||Given to trifling; marked with unbecoming levity; silly; interested especially in trifling matters.|
|Adj.||1.||frivolous - not serious in content or attitude or behavior; "a frivolous novel"; "a frivolous remark"; "a frivolous young woman"|
serious - concerned with work or important matters rather than play or trivialities; "a serious student of history"; "a serious attempt to learn to ski"; "gave me a serious look"; "a serious young man"; "are you serious or joking?"; "Don't be so serious!"