noun \ˈpach\

Definition of PATCH

a : a piece of material used medically usually to cover a wound or repair a defect—see patch graft b : a usually disk-shaped piece of material that is worn on the skin and contains a substance (as a drug) that is absorbed at a constant rate through the skin and into the bloodstream <a nicotine patch>—called also skin patch c : a shield worn over the socket of an injured or missing eye
: a circumscribed region of tissue (as on the skin or in a section from an organ) that differs from the normal color or composition <sometimes great white patches develop on the tongue, the cheeks, and the gums—Morris Fishbein>
patch transitive verb
patchy \-ē\ adjective, patch·i·er patch·i·est

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