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English definition of “deviation”

deviation

noun
 
 
/ˌdiːviˈeɪʃən/
[C or U] a difference from what is usual or expected: The letter cited 'significant deviations from current good manufacturing practice'.
[U] the difference between a particular number and the average or normal number: In a recent analysis of local temperature changes, Reno ranked first by amount of deviation from the 30-year average.
→ See also standard deviation
(Definition of deviation from the Cambridge Business English Dictionary © Cambridge University Press)
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