Definitions

1. verb

to reduce or stop the flow of something, especially water, to a lower level

“The farmer had to deflow the irrigation system to prevent the fields from flooding.”

2. verb

to remove or drain the water from a natural source, such as a lake or a river

“The authorities decided to deflow the lake to prevent the spread of waterborne diseases.”

3. verb

to cause something to flow or move downward, especially water

“The landslide caused the river to deflow and flood the surrounding area.”