[n] the act of reversing the order or place of
[n] a reversal in attitude or principle or point of view; "an about-face on foreign policy"
[n] a change from one state to the opposite state; "there was a reversal of autonomic function"
[n] turning in the opposite direction
[n] a judgment by a higher court that the judgment of a lower court was incorrect and should be set aside
[n] a decision to reverse an earlier decision
[n] turning in an opposite direction or position; "the reversal of the image in the lens"
[n] an unfortunate happening that hinders of impedes; something that is thwarting or frustrating