reinvent the wheel - definition in the American English Dictionary - Cambridge Dictionaries Online

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English definition of “reinvent the wheel”

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reinvent the wheel

to waste time learning how to do something when it is already known how to do it: We don't need to reinvent the wheel, we just need to hire someone who already knows how to make the system work.
(Definition of reinvent the wheel from the Cambridge Academic Content Dictionary © Cambridge University Press)
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