1. A piece of cloth or other material that is used to mend or to strengthen a garment or to make patchwork, a sewn-on pocket, etc.: Timmy’s pants had knee patches because he had worn holes in them while playing outside.
2. A pad or a shield worn over a sightless or injured eye: Captain Hook in Peter Pan wore a patch over one of his eyes.
3. A small piece of computer code that is inserted into a program in order to improve its functioning or to correct an error: A computer patch can be added to software in order to fix a bug; especially, as a temporary correction between two releases.
4. An adhesive piece of drug impregnated material that is worn on the skin so the drug can be absorbed gradually over time: Frank's wife wanted to know why he had so many patches on his skin and he told her, "This patch makes me stop smoking, this one makes me eat less, this one reminds me to put my clothes in the hamper instead of leaving them on the floor, and this last one helps me to remember to put the toilet seat back down."
5. A small piece of ground; especially, one that is used for gardening: Max and Mary spend some time each day taking care of their vegetable patch in their back yard.

1. A piece of material that is used to mend fabric, or an item of clothing, with a piece of material over a hole or a weak spot in it: Mary's grandmother patched up the elbows of her husband's favorite jacket because the woolen cloth had worn through.
2. Something that is put over a wound or an injury to help the healing process: Monroe's doctor told him that he should patch his mouth shut whenever he felt the need to smoke in order to help him stop smoking.