Definitions

1. verb

to cause something to turn upside down or over

“The accident underturned the car, sending it crashing into a nearby tree.”

2. verb

to reverse the direction or effect of something

“The new policy underturned the previous decision, allowing employees to work from home.”

3. noun

the act of turning something upside down or over

“The underturn of the vehicle was a result of the driver’s reckless behavior.”