to reinvent the wheel
reinvent
ri:ɪnvɛnt
riinvent
the
ðə
dhē
wheel
wi:l
vil

Definition & Meaning of "reinvent the wheel"in English

to reinvent the wheel
01

*waste a great deal of time or effort in creating something that already exists 

Examples
He spoke with the fervour of discovery, unaware that he was reinventing the wheel. 
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