noun

• (specifically) A small area, a small plot of land or piece of ground.
  "scattered patches of trees or growing corn"
• (historical) A small piece of black silk stuck on the face or neck to heighten beauty by contrast, worn by ladies in the 17th and 18th centuries; an imitation beauty mark.
  "Your black patches you wear variously."
• (medicine) A piece of material used to cover a wound.
• (medicine) An adhesive piece of material, impregnated with a drug, which is worn on the skin, the drug being slowly absorbed over a period of time.
  "Many people use a nicotine patch to wean themselves off of nicotine."

verb

• (generally with the particle "up") To repair or arrange in a hasty or clumsy manner
  "The truce between the two countries has been patched up."
• (computing) To make the changes a patch describes; to apply a patch to the files in question. Hence:
• (computing) To make the changes a patch describes; to apply a patch to the files in question. Hence:

noun

• (archaic) A paltry fellow; a rogue; a ninny; a fool.
  "Shylock: The patch is kind enough, but a huge feeder, Snail-slow in profit, and he sleeps by day More than the wild-cat;[…]"