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English definition of “straighten”

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straighten

verb  /ˈstreɪt·ən/ us  

straighten verb (MAKE NOT BEND)

[I/T] to make something so that it does not bend: [I] Her shoulders straightened, and she cleared her throat. [T] First bend and then straighten your leg. [M] You must straighten out the pipe.

straighten verb (MAKE LEVEL)

[T] to make something level: Please straighten the lampshade – it tilts to the right.
(Definition of straighten from the Cambridge Academic Content Dictionary © Cambridge University Press)
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