A small area that is different in some way from the area that surrounds it. There was a patch of grass in the middle of the desert.
A piece of material used to mend or cover a hole or weak spot. She sewed a patch over the hole in her jeans.
A period of time characterized by a particular condition. He went through a rough patch after losing his job.
A small piece of ground, especially one used for gardening. They grew vegetables in a small patch behind the house.
A piece of software designed to update or fix problems with a computer program. The company released a patch to fix the security vulnerability.
An adhesive piece of material containing medication, worn on the skin to deliver a drug transdermally. She used a nicotine patch to help her quit smoking.