reversal

a major change in attitude or principle or point of view

turning in an opposite direction or position

“the reversal of the image in the lens”

a decision to reverse an earlier decision

an unfortunate happening that hinders or impedes; something that is thwarting or frustrating

the act of reversing the order or place of

turning in the opposite direction

a change from one state to the opposite state

“there was a reversal of autonomic function”

a judgment by a higher court that the judgment of a lower court was incorrect and should be set aside