From The Collaborative International Dictionary of English v.0.48:
Patch \Patch\ (p[a^]ch), v. t. [imp. & p. p. Patched (p[a^]cht); p. pr. & vb. n. Patching.] 1. To mend by sewing on a piece or pieces of cloth, leather, or the like; as, to patch a coat. [1913 Webster]
2. To mend with pieces; to repair with pieces festened on; to repair clumsily; as, to patch the roof of a house. [1913 Webster]
3. To adorn, as the face, with a patch or patches. [1913 Webster]
Ladies who patched both sides of their faces. --Spectator. [1913 Webster]
4. To make of pieces or patches; to repair as with patches; to arrange in a hasty or clumsy manner; -- generally with up; as, to patch up a truce. "If you'll patch a quarrel." --Shak. [1913 Webster]
From The Collaborative International Dictionary of English v.0.48:
Patch \Patch\, n. [OE. pacche; of uncertain origin, perh. for placche; cf. Prov. E. platch patch, LG. plakk, plakke.] 1. A piece of cloth, or other suitable material, sewed or otherwise fixed upon a garment to repair or strengthen it, esp. upon an old garment to cover a hole. [1913 Webster]
Patches set upon a little breach. --Shak. [1913 Webster]
2. Hence: A small piece of anything used to repair a breach; as, a patch on a kettle, a roof, etc. [1913 Webster]
3. A small piece of black silk stuck on the face, or neck, to hide a defect, or to heighten beauty. [1913 Webster]
Your black patches you wear variously. --Beau. & Fl. [1913 Webster]
4. (Gun.) A piece of greased cloth or leather used as wrapping for a rifle ball, to make it fit the bore. [1913 Webster]
5. Fig.: Anything regarded as a patch; a small piece of ground; a tract; a plot; as, scattered patches of trees or growing corn. [1913 Webster]
Employed about this patch of ground. --Bunyan. [1913 Webster]
6. (Mil.) A block on the muzzle of a gun, to do away with the effect of dispart, in sighting. [1913 Webster]
7. A paltry fellow; a rogue; a ninny; a fool. [Obs. or Colloq.] "Thou scurvy patch." --Shak. [1913 Webster]
Patch ice, ice in overlapping pieces in the sea.
Soft patch, a patch for covering a crack in a metallic vessel, as a steam boiler, consisting of soft material, as putty, covered and held in place by a plate bolted or riveted fast. [1913 Webster]