Source : Webster's Revised Unabridged Dictionary (1913)

Corroboration \Cor*rob`o*ra"tion\ (k?r-r?b`?-r?"sh?n), n. [Cf.
   F. corroboration.]
   1. The act of corroborating, strengthening, or confirming;
      addition of strength; confirmation; as, the corroboration
      of an argument, or of information.

   2. That which corroborates.

Source : WordNet®

corroboration
     n : confirmation that some fact or statement is true [syn: {documentation},
          {certification}]