Source : Webster's Revised Unabridged Dictionary (1913)

Graciousness \Gra"cious*ness\, n.
   Quality of being gracious.

Source : WordNet®

graciousness
     n 1: excellence of manners or social conduct [ant: {ungraciousness}]
     2: the quality of being kind and gentle [syn: {benignity}, {benignancy}]
        [ant: {malignity}, {malignity}]