flatland
Flatland commonly refers to land that is very level and lacks significant variations in elevation, such as plains, prairies, or floodplains. In a mathematical context, flatland denotes a two-dimensional space—a plane with only length and width, where points, lines, and shapes exist and move without depth. The concept is central to studies of geometry and topology as a model for two-dimensional motion and shape interactions.
Flatland: A Romance of Many Dimensions, published in 1884 by Edwin A. Abbott, is a satirical novella
Outside of literature, flatland is used in geography and geology as a descriptive term for flat terrains,