The Collaborative International Dictionary of English v.0.48:

Accomplishment \Ac*com"plish*ment\ (-ment), n. [F.
   accomplissement, fr. accomplir.]
   1. The act of accomplishing; entire performance; completion;
      fulfillment; as, the accomplishment of an enterprise, of a
      prophecy, etc.
      [1913 Webster]

   2. That which completes, perfects, or equips thoroughly;
      acquirement; attainment; that which constitutes excellence
      of mind, or elegance of manners, acquired by education or
      training. "My new accomplishment of dancing." --Churchill.
      "Accomplishments befitting a station." --Thackeray.
      [1913 Webster]

            Accomplishments have taken virtue's place,
            And wisdom falls before exterior grace. --Cowper.
      [1913 Webster]

WordNet (r) 3.0 (2006):

accomplishment
    n 1: the action of accomplishing something [syn:
         accomplishment, achievement]
    2: an ability that has been acquired by training [syn: skill,
       accomplishment, acquirement, acquisition, attainment]