Outflow may refer to: Capital outflow - an economic term describing capital flowing out of (or leaving) a particular economy. Bipolar outflow in astronomy represents two continuous flows of gas from the poles of a star. Outflow - In hydrology, the discharge of a river is the volume of water transported by it in a certain amount of time. Outflow, in meteorology, is air that flows outwards from a thunderstorm. Outflow boundary in atmospheric science means thunderstorm-cooled air (outflow) from… (More on Outflow)