Superstition, belief or practice that is not based on reason. Some superstitions involve the belief that an incident will have certain results, or foretell an event—for example, believing that walking under a ladder will bring bad luck. Other superstitions attribute qualities and powers to objects, such as a rabbit foot bringing luck. The origins of superstitions vary, but they have probably existed in every culture since ancient times. They arise out of uncertainty and fear and the desire to empower oneself somehow. Some superstitions are part of a cultural or religious tradition and are believed by a number of people, such as the belief that a groom should not see his bride before the ceremony on their wedding day. Other superstitions may be personal, such as having a lucky number.