A reversal is when something changes to its opposite or goes backward from the way it was going. If your basketball team is losing badly at halftime but comes back to win, that's a reversal of fortune. When a judge overturns a lower court's decision, that's a reversal of the original ruling.

The word captures those moments when direction or outcome flips completely. A student struggling with math might experience a reversal after getting a tutor and suddenly understanding it. A country winning a war might suffer a sudden reversal when enemy reinforcements arrive unexpectedly.

In storytelling, a reversal is a plot twist where circumstances change dramatically. The hero who seemed doomed finds a way to win, or the villain who appeared unstoppable gets defeated. These reversals keep stories exciting because they remind us that nothing stays the same forever.

You'll also hear reverse used as a verb meaning to go backward or undo something. Cars go in reverse to back up. You might reverse your opinion after learning new information. A scientist might try to reverse the effects of pollution. The key idea is always the same: changing direction or turning something around to face the opposite way.