Foreboding signs, also known as OMENS, are signals or warnings of potential danger or misfortune. They can be seen as a sign of bad luck or a warning of something negative that is about to happen. Foreboding signs can take many forms, such as a sudden chill in the air, a black cat crossing one's path, or a feeling of dread. In some cultures, these signs are taken very seriously and are believed to be a warning from the gods or other supernatural forces.