Source : Webster's Revised Unabridged Dictionary (1913)

Grandeur \Gran"deur\, n. [F., fr. grand. See {Grand}.]
   The state or quality of being grand; vastness; greatness;
   splendor; magnificence; stateliness; sublimity; dignity;
   elevation of thought or expression; nobility of action.

         Nor doth this grandeur and majestic show Of luxury . .
         . allure mine eye.                       --Milton.

   Syn: Sublimity; majesty; stateliness; augustness; loftiness.
        See {Sublimity}.

Source : WordNet®

grandeur
     n 1: the quality of being magnificent or splendid or grand [syn:
          {magnificence}, {brilliance}, {splendor}, {splendour}, {grandness}]
     2: the quality of being exalted in character or ideals or
        conduct [syn: {nobility}, {magnanimousness}]