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English definition of “approximation”

approximation

noun [C, usually singular]     /əˌprɒksɪˈmeɪʃən/
a figure that is close to a particular number or time but not exactly that number or time : Sales-tax receipts provide an approximation of retail sales .
something that is similar to another thing but not exactly the same: approximation to sth A closer approximation to the truth is that he started out as a genuine entrepreneur .
(Definition of approximation noun from the Cambridge Business English Dictionary © Cambridge University Press)
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