1A traditional story, especially one concerning the early history of a people or explaining some natural or social phenomenon, and typically involving supernatural beings or events.
‘ancient Celtic myths’
1.1Traditional stories or legends collectively.
‘the heroes of Greek myth’
2A widely held but false belief or idea.
‘he wants to dispel the myth that sea kayaking is too risky or too strenuous’
2.1A misrepresentation of the truth.
‘attacking the party's irresponsible myths about privatization’
2.2A fictitious or imaginary person or thing.
‘nobody had ever heard of Simon's mysterious friend—Anna said he was a myth’
https://www.lexico.com/en/definition/myth
Which of those definitions contradicted what I said?