The Collaborative International Dictionary of English v.0.48:

Meanness \Mean"ness\, n.
   1. The condition, or quality, of being mean; want of
      excellence; poorness; lowness; baseness; sordidness;
      stinginess.
      [1913 Webster]

            This figure is of a later date, by the meanness of
            the workmanship.                      --Addison.
      [1913 Webster]

   2. A mean act; as, to be guilty of meanness. --Goldsmith.
      [1913 Webster] meanspirited

WordNet (r) 3.0 (2006):

meanness
    n 1: the quality of being deliberately mean [syn: beastliness,
         meanness]
    2: extreme stinginess [syn: meanness, minginess,
       niggardliness, niggardness, parsimony,
       parsimoniousness, tightness, tightfistedness,
       closeness]

Moby Thesaurus II by Grady Ward, 1.0:

209 Moby Thesaurus words for "meanness":
   Lenten fare, abjectness, abominableness, atrociousness, austerity,
   authoritarianism, baseness, bearishness, beggarliness, bigotry,
   bitchiness, blind side, blind spot, blinders, cantankerousness,
   cheapness, churlishness, closed mind, coarseness, commonness,
   commonplaceness, contemptibility, contemptibleness, crabbedness,
   cramped ideas, crankiness, crossness, crumminess, crustiness,
   cussedness, daintiness, debasement, deficiency, degradation,
   delicacy, depravity, despicableness, devilment, devilry, deviltry,
   diminutiveness, disagreeability, enormity, evil intent,
   excitability, execrableness, exiguity, exiguousness, failure,
   fanaticism, fewness, foulness, fourth-rateness, fractiousness,
   fulsomeness, gaudiness, grossness, harmfulness, hatefulness,
   heinousness, helotism, helotry, hideboundness, homeliness,
   huffiness, huffishness, humbleness, humility, ignobility,
   illiberality, imperfection, inadequacy, incompetence,
   inconsequentiality, inconsiderableness, inferiority, inferiorness,
   ingloriousness, iniquitousness, innocuousness, insignificance,
   insufficiency, insularism, insularity, invidiousness, irascibility,
   irritability, jejuneness, jejunity, leanness, little-mindedness,
   littleness, lowlihood, lowliness, lowness, maladroitness,
   maleficence, malice, malice aforethought, malice prepense,
   maliciousness, malignance, malignancy, malignity, meagerness,
   mean mind, mediocrity, meekness, menialness, meretriciousness,
   meritlessness, minginess, minuteness, miserableness, miserliness,
   moderateness, modesty, monstrousness, narrow sympathies,
   narrow views, narrow-mindedness, narrowness, nastiness,
   nearsightedness, nefariousness, niggardliness, noxiousness,
   obnoxiousness, odiousness, odium theologicum, ordinariness,
   orneriness, paltriness, parochialism, parsimony, penuriousness,
   peonage, perversity, pettiness, petty mind, picayunishness,
   pitiableness, pitifulness, plainness, plebeianism, pokiness,
   poorness, provincialism, puniness, purblindness, rankness, sadness,
   scabbiness, scantiness, scantness, scrawniness, scrimpiness,
   scrubbiness, scruffiness, scumminess, scurviness, second-rateness,
   serfdom, servility, shabbiness, shoddiness, shortsightedness,
   shut mind, simpleness, skimpiness, slavery, slavishness,
   slenderness, slightness, slim pickings, slimness, smallness,
   snappishness, sordidness, sorriness, spareness, squalor,
   stinginess, straitlacedness, stuffiness, submissiveness,
   subnormality, subservience, subserviency, teachableness, testiness,
   thinness, third-rateness, tininess, triviality, ugliness,
   uncatholicity, ungenerousness, unimportance, unmagnanimousness,
   unpretentiousness, unskillfulness, unworthiness, vileness,
   vulgarity, waspishness, wickedness, worthlessness, wretchedness