Source : Webster's Revised Unabridged Dictionary (1913)

Infamy \In"fa*my\, n.; pl. {Infamies}. [L. infamia, fr. infamis
   infamous; pref. in- not + fama fame: cf. F. infamie. See
   {Fame}.]
   1. Total loss of reputation; public disgrace; dishonor;
      ignominy; indignity.

            The afflicted queen would not yield, and said she
            would not . . . submit to such infamy. --Bp. Burnet.

   2. A quality which exposes to disgrace; extreme baseness or
      vileness; as, the infamy of an action.

   3. (Law) That loss of character, or public disgrace, which a
      convict incurs, and by which he is at common law rendered
      incompetent as a witness.

Source : WordNet®

infamy
     n 1: a state of extreme dishonor; "a date which will live in
          infamy"- F.D.Roosevelt; "the name was a by-word of scorn
          and opprobrium throughout the city" [syn: {opprobrium}]
          [ant: {fame}]
     2: evil fame or public reputation [ant: {fame}]