1. Of little weight or importance; not worth notice; slight; as, a frivolous argument.
2. Given to trifling; marked with unbecoming levity; silly; interested especially in trifling matters.
His personal tastes were low and frivolous. --Macaulay.
Syn: -- Trifling; trivial; slight; petty; worthless.
-- Friv*o*lous*ly, adv. -- Friv*o*lous*ness, n.
adv : in a frivolous manner; "she spends her time frivolously
enjoying the easy life of a rich and spoiled girl"