outflow outflow /ˈaʊtˌfloʊ/

noun

1. () The discharge of a fluid from some container  ( escape , leak , leakage , outflow )
   the discharge of a fluid from some container
    They tried to stop the escape of gas from the damaged pipe
   they tried to stop the escape of gas from the damaged pipe
    He had to clean up the leak
   he had to clean up the leak
   
   
2. A natural flow of ground water  ( fountain , natural spring , outflow , outpouring , spring )
   a natural flow of ground water
     The bubbling spring provided a refreshing source of pure water, quenching their thirst.
   The bubbling spring provided a refreshing source of pure water, quenching their thirst.
   
3. The process of flowing out  ( effluence , efflux , outflow )
   the process of flowing out