n.
1.a change from one state to the opposite state
2.an unfortunate happening that hinders of impedes
3.turning in an opposite direction or position
4.a decision to reverse an earlier decision
5.a judgment by a higher court that the judgment of a lower court was incorrect and should be set aside
6.turning in the opposite direction
7.the act of reversing the order or place of
8.a reversal in attitude or principle or point of view