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English definition of “rethink”

rethink

verb [I or T] uk   /ˌriːˈθɪŋk/ (rethought) us  
C1 to think again about a plan, idea, or system in order to change or improve it: Her family's disapproval made her rethink her plans. [+ question word] The European Commission is having to rethink how it can maintain farmers' incomes while cutting costs and excess production.Thinking and contemplatingChanging your mind
rethink
noun [S] uk   /ˈriː.θɪŋk/ us  
This new information means we should have a rethink.Thinking and contemplating
(Definition of rethink from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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