Source : Webster's Revised Unabridged Dictionary (1913)

Enormity \E*nor"mi*ty\, n.; pl. {Enormities}. [L. enormitas, fr.
   enormis enormous: cf. F. ['e]normit['e]. See {Enormous}.]
   1. The state or quality of exceeding a measure or rule, or of
      being immoderate, monstrous, or outrageous.

            The enormity of his learned acquisitions. --De
                                                  Quincey.

   2. That which is enormous; especially, an exceeding offense
      against order, right, or decency; an atrocious crime;
      flagitious villainy; an atrocity.

            These clamorous enormities which are grown too big
            and strong for law or shame.          --South.

Source : WordNet®

enormity
     n 1: the quality of being outrageous [syn: {outrageousness}]
     2: vastness of size or extent; "in careful usage the noun
        enormity is not used to express the idea of great size";
        "universities recognized the enormity of their task"
     3: the quality of extreme wickedness
     4: an act of extreme wickedness