1. a belief or practice that is not based on reason or scientific knowledge, often involving magic or luck

Examples

• Many people consider breaking a mirror to be bad luck, but it’s just a superstition.
• The superstition about black cats crossing your path is common in many cultures.
• She refused to walk under the ladder due to superstition.
• Knocking on wood is a popular superstition meant to prevent bad luck.
• The team’s winning streak made them cling to every superstition they could think of.
• His grandmother’s superstitions included never opening an umbrella indoors.
• The superstition surrounding Friday the 13th affects many people’s behavior.