The Collaborative International Dictionary of English v.0.48:

Perfection \Per*fec"tion\, n. [F. perfection, L. perfectio.]
   1. The quality or state of being perfect or complete, so that
      nothing requisite is wanting; entire development;
      consummate culture, skill, or moral excellence; the
      highest attainable state or degree of excellence;
      maturity; as, perfection in an art, in a science, or in a
      system; perfection in form or degree; fruits in
      perfection.
      [1913 Webster]

   2. A quality, endowment, or acquirement completely excellent;
      an ideal faultlessness; especially, the divine attribute
      of complete excellence. --Shak.
      [1913 Webster]

            What tongue can her perfections tell? --Sir P.
                                                  Sidney.
      [1913 Webster]

   To perfection, in the highest degree of excellence;
      perfectly; as, to imitate a model to perfection.
      [1913 Webster]

WordNet (r) 3.0 (2006):

to perfection
    adv 1: in every detail; "the new house suited them to a T" [syn:
           to a T, to the letter, just right, to perfection]