reversal

The act or an instance of reversing.

The state of being reversed.

A usually adverse change in fortune.

The act or an instance of changing or setting aside a lower court’s decision by a higher court.

A maneuver in wrestling in which a competitor being controlled by the opponent suddenly reverses the situation and gains control.

The act of reversing, or of altering a position, direction, action, condition, or state to its opposite or contrary; also, the state of being reversed.

In physics, specifically, the changing of a bright line in a spectrum, produced by an incandescent vapor, into a dark line (by absorption), and the reverse.

The act of repealing, revoking, or annulling; a change or overthrowing: as, the reversal of a judgment, which amounts to an official declaration that it is erroneous and rendered void or terminated; the reversal of an attainder or of an outlawry.

In biology, reversion.