American English

Definition of approximation noun from the Oxford Advanced American Dictionary



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  1. 1an estimate of a number or an amount that is almost correct, but not exact That's just an approximation, you understand. An approximation of the numbers expected to attend would be 350.
  2. 2 approximation (of/to something) a thing that is similar to something else, but is not exactly the same Our results should be a good approximation of the true state of affairs.
See the Oxford Advanced Learner's Dictionary entry: approximation