To repair, as anything that is torn, broken, defaced, decayed, or the like; to restore from partial decay, injury, or defacement.

“My trousers have a big rip in them and need mending.”

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

“Her stutter was mended by a speech therapist.”

To help, to advance, to further; to add to.

The act by which something is mended or repaired.