An area from which water drains into a particular lake, river, etc.; the catchment area of a large river includes its tributaries.
The area served by a local institution, such as a hospital or school, or by extension, a railway station.
A reservoir or tank for holding water, especially for catching and holding rainwater for later use.
The vessel surrounding the condenser in a steam engine.
In a flush toilet, the container in which the water used for flushing is held; a toilet tank.
A cisterna.