Definition of patch noun from the Oxford Advanced Learner's Dictionary

    small area
  1. 1a small area of something, especially one which is different from the area around it a black dog with a white patch on its back a bald patch on the top of his head damp patches on the wall patches of dense fog We sat in a patch of shade under a tree. Synonymspatchdot mark spotThese are all words for a small part on a surface that is a different colour from the rest.patch an area of something, especially one which is different from the area around it:a white dog with a black patch on its head patches of dense fogdot a small round mark on something, especially one that is printed:The letters ‘i’ and ‘j’ have dots over them. The island is a small green dot on the map.mark a noticeable area of colour on the body of a person or animal:The horse had a white mark on its head.spot a small round area that is a different colour or feels different from the surface it is on:Which has spots, a leopard or a tiger?Patterns a patch/​dot/​mark/​spot on something with patches/​dots/​marks/​spots a blue/​black/​red, etc. patch/​dot/​mark/​spot
  2. piece of material
  3. 2a small piece of material that is used to cover a hole in something or to make a weak area stronger, or as decoration I sewed patches on the knees of my jeans.
  4. 3a piece of material that you wear over an eye, usually because the eye is damaged He had a black patch over one eye. see also eyepatch
  5. 4(North American English) (British English badge) a piece of material that you sew onto clothes as part of a uniform
  6. 5a piece of material that people can wear on their skin to help them to stop smoking nicotine patches See related entries: Addiction
  7. piece/area of land
  8. 6a small piece of land, especially one used for growing vegetables or fruit a vegetable patch See related entries: In the garden
  9. 7(British English, informal) an area that somebody works in, knows well or comes from He knows every house in his patch. She has had a lot of success in her home patch.
  10. difficult time
  11. 8(informal, especially British English) a period of time of the type mentioned, usually a difficult or unhappy one to go through a bad/difficult/sticky patch see also purple patch
  12. in computing
  13. 9a small piece of code (= instructions that a computer can understand) which can be added to a computer program to improve it or to correct a fault Follow the instructions below to download and install the patch. See related entries: Computer software, Computer problems, Computer programming
  14. Word Origin late Middle English: perhaps from a variant of Old French pieche, dialect variant of piece ‘piece’.Extra examples Flowers provide bright patches of colour/​color. He has a small bald patch on the crown of his head. He wears a patch from his employer, Verizon. Her jeans have patches all over them. I spent Sunday working in my vegetable patch. I was going through a patch of poor health. It has a UPS patch sewn on the right shoulder. She wore a jacket with bright patches sewn onto it. Students were wearing American flag patches on their sleeves. The team has hit a purple patch, with nine wins from their last ten games. The track passes through dense weeds and briar patches. The velvet curtains were faded in patches. Their business hit a sticky patch last year. There were some patches of clear blue sky. This led Nixon into a political briar patch= painful situation difficult to escape. We found a nice patch of grass to sit on. an isolated patch of forest dancers with patches on their costumes flowers providing little bright patches of colour around the garden icy patches on the roads located on a small patch of flat ground working in his vegetable patch She has had a lot of success in her home patch. The team has been through a rough patch recently. There were damp patches on the wall. We did have a patch of bad luck, but we’re through it now. We had a strawberry patch beside the greenhouse. a white dog with a black patch on its backIdioms
    be not a patch on somebody/something
     
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    (informal, especially British English) to be much less good, attractive, etc. than somebody/something else This book isn’t a patch on her others. She was no great beauty. Not a patch on Martha.
See the Oxford Advanced American Dictionary entry: patch