1. outflow; effluence; efflux; spillage; spill; discharge; haemorrhage; hemorrhage; bleeding (e.g. of ink into paper)
水の流出量が一定なら、時間を測ることができるはずだ。If the outflow rate of water is constant, it should be possible to measure time.
2. outflow (of people, capital, etc.); drain (of gold, talent, etc. from a country); leak (e.g. of personal information)
どの情報が流出するのかわからないのは困る。It is troublesome not to know which information will leak.