1. (n.) Frivolity; inappropriate lack of gravity and seriousness in deportment or character\; trifling gayety; sportiveness; vanity.

2. (n.) The quality of weighing less than something else of equal bulk; relative lightness, especially as shown by rising through, or floating upon, a contiguous substance; buoyancy; -- opposed to gravity.

3. (n.) Lack of steadiness or constancy; disposition to change; fickleness; volatility.

absentmindedness absurdity airiness amusement ascent banter big deal booing bounce breeziness bubbliness buoyancy carefreeness carelessness catcalling chaffing changeableness chirpiness coquettishness daintiness debonairness delicacy derision disregard disregardfulness distraction downiness emptiness ethereality facetiousness faddishness faddism fickleness fleering flightiness flimsiness flippancy floatability fluffiness foaminess folly fooling foolishness frivolity frivolousness frothiness fun futility gentleness giddiness glee gleefulness gossameriness grinning heedlessness high glee hilariousness hilarity hissing hooting idleness inadvertence inadvertency inanity inattention inattentiveness inconsideration inconstancy incuriosity indifference inobservance jauntiness jeering jocularity jocundity jolliness jollity joshing joviality joy joyfulness joyousness lack of weight laughter leering levitation light heart lightheartedness lightmindedness lightness lightsomeness mercuriality mercurialness merriment merriness mirth mirthfulness mockery negligence nonobservance nugacity obliviousness panning perkiness pertness playfulness prankishness pranksomeness ragging raillery rallying razzing regardlessness resilience ridicule roasting roguishness scoffing shallowness silliness skittishness slenderness slightness smart-aleckiness smartness smirking sneering snickering snorting softness sportiveness superficiality taunting tenderness thoughtlessness trickery trickiness triflingness triteness triviality trivialization trivialness twitting unalertness unawareness unconsciousness undependability unheaviness unheedfulness unintentiveness unmindfulness unobservance unpredictability unreliability unwariness unwatchfulness vacuity vanity vapidity volatility waggery waggishness weightlessness yeastiness