The Collaborative International Dictionary of English v.0.48:

Skillful \Skill"ful\, a. [Written also skilful.]
   1. Discerning; reasonable; judicious; cunning. [Obs.] "Of
      skillful judgment." --Chaucer.
      [1913 Webster]

   2. Possessed of, or displaying, skill; knowing and ready;
      expert; well-versed; able in management; as, a skillful
      mechanic; -- often followed by at, in, or of; as, skillful
      at the organ; skillful in drawing.
      [1913 Webster]

            And they shall call the husbandman to mourning, and
            such as are skillful of lamentations to wailing.
                                                  --Amos v. 16.
      [1913 Webster]

   Syn: Expert; skilled; dexterous; adept; masterly; adroit;
        clever; cunning.
        [1913 Webster] -- Skill"ful*ly, adv. --
        Skill"ful*ness, n.
        [1913 Webster]

WordNet (r) 3.0 (2006):

skillfully
    adv 1: with skill; "fragments of a nearly complete jug,
           skillfully restored at the institute of archaeology"
           [syn: skillfully, skilfully]