Source : Webster's Revised Unabridged Dictionary (1913)

Ideality \I`de*al"i*ty\, n.; pl. {Idealities}.
   1. The quality or state of being ideal.

   2. The capacity to form ideals of beauty or perfection.

   3. (Phren.) The conceptive faculty.

Source : WordNet®

ideality
     n : the quality of being ideal