Source : Webster's Revised Unabridged Dictionary (1913)

Improve \Im*prove"\, v. t. [imp. & p. p. {Improved}; p. pr. &
   vb. n. {Improving}.] [Pref. in- in + prove, in approve. See
   {Approve}, {Prove.}]
   1. To make better; to increase the value or good qualities
      of; to ameliorate by care or cultivation; as, to improve
      land. --Donne.

            I love not to improve the honor of the living by
            impairing that of the dead.           --Denham.

   2. To use or employ to good purpose; to make productive; to
      turn to profitable account; to utilize; as, to improve
      one's time; to improve his means. --Shak.

            We shall especially honor God by improving
            diligently the talents which God hath committed to
            us.                                   --Barrow.

            A hint that I do not remember to have seen opened
            and improved.                         --Addison.

            The court seldom fails to improve the oppotunity.
                                                  --Blackstone.

            How doth the little busy bee Improve each shining
            hour.                                 --I. Watts.

            Those moments were diligently improved. --Gibbon.

            True policy, as well as good faith, in my opinion,
            binds us to improve the occasion.     --Washington.

   3. To advance or increase by use; to augment or add to; --
      said with reference to what is bad. [R.]

            We all have, I fear, . . . not a little improved the
            wretched inheritance of our ancestors. --Bp.
                                                  Porteus.

   Syn: To better; meliorate; ameliorate; advance; heighten;
        mend; correct; recify; amend; reform.

Improving \Im*prov"ing\, a.
   Tending to improve, beneficial; growing better. --
   {Im*prov"ing*ly}, adv.

   {Improving lease} (Scots Law), an extend lease to induce the
      tenant to make improvements on the premises.

Source : WordNet®

improving
     adj : getting higher or more vigorous; "its an up market"; "an
           improving economy" [syn: {up}]