Basin may mean: Drainage basin, a hydrological basin or catchment basin, a region of land where water drains downhill into a specified body of water Tarim Basin, located in Xinjiang, China and is one of the largest drainage basins in the world. Sedimentary basin, a low and usually sinking region that's filled with sediments from adjacent positive areas Structural basin, in geology, referring to the basin-shaped warping of underlying bedrock in a region Depression (geology), a landform lower… (More on Basin)