superstition
/ˌsupərˈstɪʃən/
noun
- A belief that is not based on reason or scientific knowledge, often involving luck, magic, or supernatural forces.
- He doesn't believe in any superstition, but he still avoids walking under ladders just in case.
- Many people have a superstition that breaking a mirror brings seven years of bad luck.
- In some cultures, there is a superstition that black cats crossing your path is a bad omen.