overconfidence

noun
over·con·fi·dence | \ ˌō-vər-ˈkän-fə-dən(t)s , -ˌden(t)s \

Definition of overconfidence 

: an excess of confidence (as in one's abilities or judgment) : confidence that is not justified warned against overconfidence when investing People tend to overestimate their skills behind the wheel and underestimate the skills of the boobs and psychopaths driving around them, a phenomenon that psychologists call "optimism bias" and the rest of us simply call delusional overconfidence. —David H. Freedman

First Known Use of overconfidence

1622, in the meaning defined above

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The first known use of overconfidence was in 1622

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Spanish Central: Translation of overconfidence

Nglish: Translation of overconfidence for Spanish Speakers

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