Of little weight or importance; not worth notice; slight; as, a frivolous argument
If you describe someone as frivolous, you mean they behave in a silly or light-hearted way, rather than being serious and sensible. I just decided I was a bit too frivolous to be a doctor
disapproval If you describe an activity as frivolous, you disapprove of it because it is not useful and wastes time or money. The group says it wants politicians to stop wasting public money on what it believes are frivolous projects
not serious in content or attitude or behavior; "a frivolous novel"; "a frivolous remark"; "a frivolous young woman
Given to trifling; marked with unbecoming levity; silly; interested especially in trifling matters
not serious in content or attitude or behavior; "a frivolous novel"; "a frivolous remark"; "a frivolous young woman"