Source : Webster's Revised Unabridged Dictionary (1913)

Attune \At*tune"\, v. t. [imp. & p. p. {Attuned}; p. pr. & vb.
   n. {Attuning}.] [Pref. ad- + tune.]
   1. To tune or put in tune; to make melodious; to adjust, as
      one sound or musical instrument to another; as, to attune
      the voice to a harp.

   2. To arrange fitly; to make accordant.

            Wake to energy each social aim, Attuned spontaneous
            to the will of Jove.                  --Beattie.

Source : WordNet®

attune
     v : adjust or accustom to; bring into harmony with