alarum (noun)

1. In the science fiction movie, the spaceship's alarum blared to warn the crew of an approaching asteroid.

2. During the religious ceremony, the sacred text recitation was interrupted by the alarum sounding, foretelling a dark prophecy.

3. In the comic book, the superhero's alarum went off, alerting him to a nearby crime in progress.

4. In the anime series, the protagonist's alarum rang as an ominous sign of an impending battle with a powerful enemy.