IPA: /ˈaʊtˌfloʊ/
KK: /aʊtˈfloʊ/
To flow out or escape from a source, often in a continuous manner.
Water began to outflow from the broken pipe.
Past: outflowed
Past Participle: outflowed
A movement of something, such as water or money, that flows out from a source.
The outflow of water from the reservoir increased after the heavy rain.
Outflow is formed from "out-" (meaning outside or away) and "flow" (from Old English "flowan", meaning to flow or run). The word describes the act of flowing out or moving away from a source.
Think of something moving 'outside' ('out-') and 'flowing' ('flow') away from its origin — that's what outflow means.