The Collaborative International Dictionary of English v.0.48:

Denounce \De*nounce"\, v. t. [imp. & p. p. Denounced; p. pr. &
   vb. n. Denouncing.] [F. d['e]noncer, OF. denoncier, fr. L.
   denuntiare, denunciare; de- + nunciare, nuntiare, to
   announce, report, nuntius a messenger, message. See Nuncio,
   and cf. Denunciate.]
   1. To make known in a solemn or official manner; to declare;
      to proclaim (especially an evil). [Obs.]
      [1913 Webster]

            Denouncing wrath to come.             --Milton.
      [1913 Webster]

            I denounce unto you this day, that ye shall surely
            perish.                               --Deut. xxx.
                                                  18.
      [1913 Webster]

   2. To proclaim in a threatening manner; to threaten by some
      outward sign or expression.
      [1913 Webster]

            His look denounced desperate.         --Milton.
      [1913 Webster]

   3. To point out as deserving of reprehension or punishment,
      etc.; to accuse in a threatening manner; to invoke censure
      upon; to stigmatize.
      [1913 Webster]

            Denounced for a heretic.              --Sir T. More.
      [1913 Webster]

            To denounce the immoralities of Julius C[ae]sar.
                                                  --Brougham.
      [1913 Webster]