deviation

US /ˌdiː.viˈeɪ.ʃən/

UK /ˌdiː.viˈeɪ.ʃən/

1.

the action of departing from an established course or accepted standard.

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deviation from a norm

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divergence digression departure deflection difference variation variance alteration veering straying fluctuation aberration abnormality irregularity anomaly inconsistency discrepancy change shift veer swerve bend drift

2.

the amount by which a single measurement differs from a fixed value such as the mean.

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a significant deviation from the average value