Reihendorf is a German word that means "strip village." It's a type of settlement that's very straight and narrow, like a long ribbon. Instead of houses being spread out in all directions, they're all lined up next to each other along a single road.
Imagine if you had a really long piece of paper and you drew a bunch of houses on it next to each other. That would be like a reihendorf. The people who live in reihendorfs usually have very small plots of land, so they have to make the most of the space they have.
Reihendorfs are usually located in rural areas where there isn't a whole lot of space for big towns or cities. People who live in reihendorfs may be farmers, and they might use their land to grow crops or raise animals. Because all the houses are so close together, people who live in reihendorfs usually know all their neighbors very well and help each other out when they need it.