The Collaborative International Dictionary of English v.0.48:

Practice \Prac"tice\, v. t. [imp. & p. p. Practiced; p. pr. &
   vb. n. Practicing.] [Often written practise, practised,
   practising.]
   1. To do or perform frequently, customarily, or habitually;
      to make a practice of; as, to practice gaming. "Incline
      not my heart . . . practice wicked works." --Ps. cxli. 4.
      [1913 Webster]

   2. To exercise, or follow, as a profession, trade, art, etc.,
      as, to practice law or medicine.
      [1913 Webster]

   2. To exercise one's self in, for instruction or improvement,
      or to acquire discipline or dexterity; as, to practice
      gunnery; to practice music.
      [1913 Webster]

   4. To put into practice; to carry out; to act upon; to
      commit; to execute; to do. "Aught but Talbot's shadow
      whereon to practice your severity." --Shak.
      [1913 Webster]

            As this advice ye practice or neglect. --Pope.
      [1913 Webster]

   5. To make use of; to employ. [Obs.]
      [1913 Webster]

            In malice to this good knight's wife, I practiced
            Ubaldo and Ricardo to corrupt her.    --Massinger.
      [1913 Webster]

   6. To teach or accustom by practice; to train.
      [1913 Webster]

            In church they are taught to love God; after church
            they are practiced to love their neighbor. --Landor.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Practiced \Prac"ticed\, a. [Often written practised.]
   1. Experienced; expert; skilled; as, a practiced marksman. "A
      practiced picklock." --Ld. Lytton.
      [1913 Webster]

   2. Used habitually; learned by practice.
      [1913 Webster]

WordNet (r) 3.0 (2006):

practiced
    adj 1: having or showing knowledge and skill and aptitude;
           "adept in handicrafts"; "an adept juggler"; "an expert
           job"; "a good mechanic"; "a practiced marksman"; "a
           proficient engineer"; "a lesser-known but no less
           skillful composer"; "the effect was achieved by skillful
           retouching" [syn: adept, expert, good, practiced,
           proficient, skillful, skilful]
    2: skillful after much practice [syn: practiced, practised]

Moby Thesaurus II by Grady Ward, 1.0:

38 Moby Thesaurus words for "practiced":
   accomplished, at concert pitch, blase, career, coached, conversant,
   cosmopolitan, cosmopolite, experienced, finished, initiate,
   initiated, knowing, mature, matured, not born yesterday, old,
   old-time, practical, prepared, primed, professional, ripe, ripened,
   sagacious, seasoned, skilled, sophisticated, technical, trained,
   tried, tried and true, versed, vet, veteran, world-wise, worldly,
   worldly-wise