Outflow (contrasted with inflow) 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.
  • Discharge (hydrology) - In hydrology, the outflow or discharge of a river is the volume of water transported by it in a certain amount of time.
  • Outflow (meteorology), in meteorology, is air that flows outwards from a thunderstorm.
  • Outflow boundary in atmospheric science means thunderstorm-cooled air (outflow) from the surrounding air.