What are unlucky omens?

Unlucky omens are signs or events believed to predict misfortune or bad luck. These can vary across cultures, but common examples include black cats crossing one's path, breaking mirrors, or finding a four-leaf clover. Many people interpret these signs based on superstition and folklore, often attributing personal significance to them. Ultimately, the perception of unlucky omens is largely subjective and can differ widely among individuals and societies.