The Collaborative International Dictionary of English v.0.48:

Mend \Mend\ (m[e^]nd), v. t. [imp. & p. p. Mended; p. pr. &
   vb. n. Mending.] [Abbrev. fr. amend. See Amend.]
   [1913 Webster]
   1. To repair, as anything that is torn, broken, defaced,
      decayed, or the like; to restore from partial decay,
      injury, or defacement; to patch up; to put in shape or
      order again; to re-create; as, to mend a garment or a
      machine.
      [1913 Webster]

   2. To alter for the better; to set right; to reform; hence,
      to quicken; as, to mend one's manners or pace.
      [1913 Webster]

            The best service they could do the state was to mend
            the lives of the persons who composed it. --Sir W.
                                                  Temple.
      [1913 Webster]

   3. To help, to advance, to further; to add to.
      [1913 Webster]

            Though in some lands the grass is but short, yet it
            mends garden herbs and fruit.         --Mortimer.
      [1913 Webster]

            You mend the jewel by the wearing it. --Shak.
      [1913 Webster]

   Syn: To improve; help; better; emend; amend; correct;
        rectify; reform.
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Mend \Mend\, v. i.
   To grow better; to advance to a better state; to become
   improved; to recover; to heal. --Shak.
   [1913 Webster +PJC]

   on the mend pred. a. recovering from an illness or injury.
      [PJC]

WordNet (r) 3.0 (2006):

mend
    n 1: sewing that repairs a worn or torn hole (especially in a
         garment); "her stockings had several mends" [syn: mend,
         patch, darn]
    2: the act of putting something in working order again [syn:
       repair, fix, fixing, fixture, mend, mending,
       reparation]
    v 1: restore by replacing a part or putting together what is
         torn or broken; "She repaired her TV set"; "Repair my shoes
         please" [syn: repair, mend, fix, bushel, doctor,
         furbish up, restore, touch on] [ant: break, bust]
    2: heal or recover; "My broken leg is mending" [syn: mend,
       heal]