outflow

noun

1. the act of flowing out: We need flood control to stem the river’s outflow.
2. something that flows out: to measure the outflow in gallons per minute.
3. any outward movement: the annual outflow of tourists.

noun

1. anything that flows out, such as liquid, money, ideas, etc
2. the amount that flows out
3. the act or process of flowing out

n.1869, from out (adv.) + flow (n.).