Reversal

Reversal often refers to:

Reversal (law), when the decision of a court of appeal is that the judgment of a lower court was incorrect
Reversal (wrestling), an action in which a defender achieves an offensive position

Reversal may also refer to:

Entertainment

Geomagnetic reversal, a change in a planet's magnetic field such that the positions of magnetic north and magnetic south are interchanged
Medical reversal, when a newer and methodologically superior clinical trial produces results that contradict existing clinical practice
Reversal agent, an antidote
Reversal film, a type of photographic film that produces a positive image on a transparent base
Reversal test, a heuristic designed to spot and eliminate status quo bias
Reversal theory, a structural, phenomenological theory of personality, motivation, and emotion in the field of psychology
Risk reversal, a measure of the volatility skew or to a trading strategy in finance
Role reversal, a psychotherapeutic technique
Russian reversal, a type of joke, usually starting with the words "In Soviet Russia"
Thrust reversal, the temporary diversion of an aircraft engine's thrust

Aristotle's concept of peripeteia, a reversal of circumstances, or turning point
Reversal, a formal language concept, see Formal language#Operations on languages
Reversal, an options-trading strategy, see Reversal (options)