1. (n.) Inanition; void space; vacuity; emptiness.

2. (n.) Want of seriousness; aimlessness; frivolity.

3. (n.) An inane, useless thing or pursuit; a vanity; a silly object; -- chiefly in pl.; as, the inanities of the world.

absence of mind absurdity agnosticism aimlessness aridity asininity barrenness battiness big deal blank blank mind blankmindedness blankness bloodlessness bootlessness brainlessness buffoonery callowness calm of mind characterlessness clean slate clownishness colorlessness counterproductiveness counterproductivity crackpottedness crankiness craziness daffiness dead letter deadness desipience dismalness dottiness dragginess dreariness dryness dullness dustiness eccentricity effeteness emptiness emptiness of mind empty sound empty space empty-headedness etiolation failure fallow mind fatuity fatuousness fecklessness flatness flavorlessness flimsiness folly foolery foolheadedness foolishness frivolity frivolousness fruitlessness futility giddiness goofiness greenhornism greenness heaviness hiatus of learning hollowness idiocy idleness ignorance ignorantism ignorantness imbecility impotence ineffectiveness ineffectuality ineffectualness inefficaciousness inefficacy ineptitude inexcitability inexperience innocence insanity insignificance insipidity insipidness invalidity jejuneness jejunity know-nothingism knowledge-gap lack of information leadenness levity lifelessness lightness lowness of spirit lunacy madness meaninglessness mental blankness mental void mere noise mildness mindlessness nescience niaiserie nirvana noise nonsensicality nothing nothingness nugacity nullity nuttiness oblivion obscurantism otiosity paleness pallor passivity phatic communion pointlessness pokiness ponderousness preposterousness profitlessness purposelessness queerness quietism rat race rawness saplessness sappiness savorlessness screwiness senselessness shallowness silliness simpleness simplicity slenderness slightness slowness solemnity spiritlessness staleness sterility stiffness stodginess stuffiness stupidity superficiality tabula rasa tastelessness tediousness the absurd thinness thoughtfreeness thoughtlessness tranquillity triflingness triteness triviality trivialness unacquaintance unfamiliarity unintelligence uninterestingness unknowing unknowingness unliveliness unmeaningness unproductiveness unprofitability unprofitableness unripeness unsavoriness unsignificancy uselessness vacancy vacuity vacuousness vacuum valuelessness vanity vapidity vapidness vicious circle void wackiness weakness weirdness wishy-washiness witlessness woodenness worthlessness zaniness zanyism