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English definition of “straighten”

straighten

verb uk   /ˈstreɪ.tən/ us    /-ən/

straighten verb (NOT CURVING)

[I or T] to become straight or to make something become straight: He straightened his tie. Her hair is naturally curly but she always straightens it. The road straightens out after a few miles.Making things more or less smooth or straight

straighten verb (LEVEL)

[T] to make something level: The picture fell while I was trying to straighten it.Making things more or less smooth or straight

straighten verb (TIDY)

[T] to make something tidy: She stood up and straightened her clothes. Pepe was careful to straighten his room before leaving.Cleaning and tidying places and things
(Definition of straighten from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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