Source : Webster's Revised Unabridged Dictionary (1913)

Ennoblement \En*no"ble*ment\, n.
   1. The act of making noble, or of exalting, dignifying, or
      advancing to nobility. --Bacon.

   2. That which ennobles; excellence; dignity.

Source : WordNet®

ennoblement
     n 1: the state of being noble
     2: the act of raising someone to the nobility