Catchment is a term used to describe an area of land that collects and drains water, such as rain or snowmelt, into a body of water. The term can also refer to the area from which a river or stream receives its water supply. The crossword solution for this term is 'BASIN, ' which is a depression in the Earth's surface that collects and holds water. Basins are often formed by erosion or tectonic activity, and they can be found in many different shapes and sizes.