Definition of superstition noun from the Oxford Advanced American Dictionary

 

superstition

 noun
noun
NAmE//ˌsupərˈstɪʃn//
 
[uncountable, countable](often disapproving)
 
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the belief that particular events happen in a way that cannot be explained by reason or science; the belief that particular events bring good or bad luck According to superstition, breaking a mirror brings bad luck. Most cultures have their superstitions.
See the Oxford Advanced Learner's Dictionary entry: superstition