1) A superstition is a belief that certain events or circumstances have meaning or significance, even though they are not based on reason or knowledge.
2) Common superstitions include beliefs that Friday the 13th or breaking a mirror will bring bad luck, while finding a four-leaf clover or horseshoe will bring good luck.
3) Superstitions exist in many cultures and countries due to lack of scientific understanding, but education and rational thinking can help reduce irrational superstitious beliefs.