A "pump" is a mechanical device used to move fluids or gases from one place to another. It works by creating a pressure difference, allowing the fluid to flow through pipes or hoses. Pumps are commonly used in various applications, such as in water supply systems, heating and cooling systems, and automobiles. There are different types of pumps, including centrifugal pumps and positive displacement pumps. Centrifugal pumps use a rotating impeller to increase fluid velocity, while positive displacement pumps move a fixed amount of fluid with each cycle. Both types are essential in industries like construction, agriculture, and manufacturing.