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English definition of “hindsight”

hindsight

noun [U]    /ˈhɑɪndˌsɑɪt/
the ability to understand, after something has happened, why or how it was done and how it might have been done better: They are ideas that, in hindsight, often seem hair-brained.
(Definition of hindsight noun from the Cambridge Academic Content Dictionary © Cambridge University Press)
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