frivolous Definition

silly, trivial, flippant, airheaded, flighty, giddy, idle, dizzy, light, flyaway, empty-headed, featherbrained, light-headed, light-minded, vexatious, baseless, ridiculous, groundless, unfounded, unsubstantiated, pointless, irresponsible, irrelevant, petty, meaningless, futile, useless, fanciful, superficial, unfair, mindless, reckless, arbitrary, imprudent, whimsical, ungrounded, boring, misleading, improper, unhelpful, insignificant, senseless, hasty, abusive, prudent, bored, cursory, vain, shallow, casual, empty, negligible, rogue, rash, mild, surface, frivole, ill-founded, slight, unnecessary, absurd, meritless, nonsensical, extravagant, preposterous, ludicrous, childish, superfluous, specious, outrageous, unreasonable, wasteful, outlandish, unwarranted, unserious, disingenuous, inconsequential, foolish, vacuous, puerile, asinine, fatuous, trite, illogical, unimportant, laughable, unjustified, vapid, unsubstantial, frible, walk on air, fribbler, unmeritorious, rattlebrained, desipient, spurious, wrongheaded, indecorous, vindictive, fallacious,