definition of
deviation

[1] #1 deviation n. [divergence, departure, difference] a variation that deviates from the standard or norm; "the deviation from the mean". wn

[2] #2 deviation n. the difference between an observed value and the expected value of a variable or function. wn

[3] #3 deviation n. the error of a compass due to local magnetic disturbances. wn

[4] #4 deviation n. [deviance] deviate behavior. wn

[5] #5 deviation n. [diversion, digression, deflection, deflexion, divagation] a turning aside (of your course or attention or concern); "a diversion from the main highway"; "a digression into irrelevant details"; "a deflection from his goal". wn