Source : Webster's Revised Unabridged Dictionary (1913)

Abrenunciation \Ab`re*nun`ci*a"tion\, n. [LL. abrenuntiatio. See
   {Abrenounce}.]
   Absolute renunciation or repudiation. [Obs.]

         An abrenunciation of that truth which he so long had
         professed, and still believed.           --Fuller.