tighten Meaning, definition in Cambridge English Dictionary
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Meaning of "tighten" - English Dictionary

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tightenverb [I or T]

uk   us   /ˈtaɪ.tən/
B2 to become tighter or to make something become tighter, firmer, or less easy to move: Tighten the straps so they don't rub. As he struggled, the ropes tightened even more.
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(Definition of tighten from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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