Source : Webster's Revised Unabridged Dictionary (1913)

Slanderous \Slan"der*ous\, a.
   1. Given or disposed to slander; uttering slander.
      ``Slanderous tongue.'' --Shak.

   2. Embodying or containing slander; calumnious; as,
      slanderous words, speeches, or reports. --
      {Slan"der*ous*ly}, adv. -- {Slan"der*ous*ness}, n.

Source : WordNet®

slanderous
     adj : (used of statements) harmful and often untrue; tending to
           discredit or malign [syn: {calumniatory}, {calumnious},
            {defamatory}, {denigrative}, {denigrating}, {denigratory},
            {libellous}, {libelous}]