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English definition of “concentration”

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concentration

noun
 
 
/ˌkɒnsənˈtreɪʃən/
THINKING CAREFULLY [U] B2 the ability to think carefully about something you are doing and nothing elsePaying attention and being carefulCautious and vigilant
LARGE AMOUNT [C, U] a large number or amount of something in the same place: high concentrations of mineralsLarge in number or quantity
(Definition of concentration from the Cambridge Learners Dictionary © Cambridge University Press)
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