1. A sequence of events in history that has been changed from its original course, typically through time travel or supernatural intervention in science fiction contexts
In the movie, the protagonist accidentally created an altered timeline when she went back in time.
No filme, a protagonista acidentalmente criou uma linha do tempo alterada quando voltou ao passado.
2. A modified or changed chronological sequence of events or historical record
The scientist discovered evidence of an altered timeline in the quantum particles.
O cientista descobriu evidências de uma linha do tempo alterada nas partículas quânticas.