Noun outflow has 3 senses
  1. escape, leak, leakage, outflow - the unwanted discharge of a fluid from some container; "they tried to stop the escape of gas from the damaged pipe"; "he had to clean up the leak"
    --1 is a kind of discharge, outpouring, run
  2. outflow, effluence, efflux - the process of flowing out
    --2 is a kind of flow
    Antonyms: inflow, influx
  3. spring, fountain, outflow, outpouring, natural spring - a natural flow of ground water
    --3 is a kind of geological formation, formation
    --3 has particulars: Fountain of Youth; geyser; hot spring, thermal spring
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