1. a major change in attitude or principle or point of view

e.g. an about-face on foreign policy

Synonym: about-facevolte-facepolicy change

2. a change from one state to the opposite state

e.g. there was a reversal of autonomic function

3. the act of reversing the order or place of

Synonym: transposition

4. turning in the opposite direction

Synonym: reversionreverseturnaboutturnaround

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

6. a decision to reverse an earlier decision

Synonym: change of mindflip-flopturnaboutturnaround

7. turning in an opposite direction or position

e.g. the reversal of the image in the lens

Synonym: turn around

8. an unfortunate happening that hinders or impedessomething that is thwarting or frustrating

Synonym: reversesetbackblowblack eye