Frĭv'o-lous, a.
a. [Lat. frivolus, It. & Sp. frivolo, Fr. frivole. See FRIBBLE.] 1. Of little weight, worth, or importance; not worth notice; slight; as, a frivolous argument; a frivolous objection or pretext. Swift.
Sense 2. Given to trifling; marked with unbecoming levity; silly. “His personal tastes were low and frivolous.” Macaulay.
Synonyms—Trifling; trivial; slight; unimportant; petty; worthless.