Reversal (noun)

A change to an opposite direction, position, course, or tendency.

Origin:

Mid 16th century: from french réversal or medieval latin reversale, from latin reversus "turned back" (see reverse).

Examples:

1. The court's decision was a reversal of a previous ruling.
2. The company's financial performance showed a reversal of fortunes.
3. The sudden reversal in the team's fortunes resulted in a loss.
4. The stock market experienced a reversal of trend.
5. The new policy represents a reversal of the previous administration's stance.