Source : Webster's Revised Unabridged Dictionary (1913)

Outflow \Out"flow`\, n.
   A flowing out; efflux.

Outflow \Out*flow"\, v. i.
   To flow out. --Campbell.

Source : WordNet®

outflow
     n 1: 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" [syn: {escape}, {leak}, {leakage}]
     2: the process of flowing out [syn: {effluence}, {efflux}]
        [ant: {inflow}, {inflow}]
     3: a natural flow of ground water [syn: {spring}, {fountain}, {outpouring},
         {natural spring}]