Source : Webster's Revised Unabridged Dictionary (1913)

Renew \Re*new"\ (r?-n?"), v. t. [imp. & p. p. {Reneved} (-n?d");
   p. pr. & vb. n. {Renewing}.] [Pref. re- + new. Cf.
   {Renovate}.]
   1. To make new again; to restore to freshness, perfection, or
      vigor; to give new life to; to rejuvenate; to re?stablish;
      to recreate; to rebuild.

            In such a night Medea gathered the enchanted herbs
            That did renew old ?son.              --Shak.

   2. Specifically, to substitute for (an old obligation or
      right) a new one of the same nature; to continue in force;
      to make again; as, to renew a lease, note, or patent.

   3. To begin again; to recommence.

            The last great age . . . renews its finished course.
                                                  --Dryden.

   4. To repeat; to go over again.

            The birds-their notes renew.          --Milton.

   5. (Theol.) To make new spiritually; to regenerate.

            Be ye transformed by the renewing of your mind.
                                                  --Rom. xii. 2.

Renew \Re*new"\, v. i.
   To become new, or as new; to grow or begin again.

Source : WordNet®

renew
     v 1: re-establish on a new, usually improved, basis or make new
          or like new; "We renewed our friendship after a hiatus
          of twenty years"; "They renewed their membership" [syn:
          {regenerate}]
     2: cause to appear in a new form; "the old product was
        reincarnated to appeal to a younger market" [syn: {reincarnate}]