👉 Runout is a state of being in quick succession or disorder, especially when it comes to running. It can refer to an accumulation of rainwater, water from a faucet, or any situation where there is a sudden drop in quantity or quality of something due to excessive consumption or use. In the context of water, runout refers to a situation where a person has consumed too much water and needs to replenish their supply before they can take another drink.