(From Webster’s New College Dictionary):
Mending: 1. the act of one who mends; 2. things to be repaired by sewing, darning, patching, etc.
Mend (vt.): 1. to repair something broken, torn or worn; restore to good condition; make whole; fix; to make better. 2. improve; reform; set right. 3. to atone for; make amends for.
Mend (vi.): 1. to get better; improve, esp. in health. 2. to grow together again or heal, as a fracture.
Mend (n.): 1. the act of mending; improvement. 2. a mended place, as on a garment
On the mend: improving, esp. in health.
Mend (notes): THE general word implying a making whole again something has been broken, torn, etc.