Adjective
Of little weight or importance; not worth notice; slight; as, a frivolous argument.
Given to trifling; marked with unbecoming levity; silly; interested especially in trifling matters.
Source: Webster's dictionarya frivolous novel Source: Internet
a frivolous remark Source: Internet
a frivolous young woman Source: Internet
Although at first glance it may seem frivolous and silly, the underlying storylines and character arcs that make up the show are actually really deep and important. Source: Internet
Applications While anagramming is certainly a recreation first, there are ways in which anagrams are put to use, and these can be more serious, or at least not quite frivolous and formless. Source: Internet
Because such a defense or claim wastes the court's and the other parties' time, resources and legal fees, sanctions may be imposed by a court upon the party or the lawyer who presents the frivolous defense or claim. Source: Internet