deviation

noun

1. (countable, uncountable)The act of deviating; wandering off the correct or true path or road.
2. (countable, uncountable)A departure from the correct way of acting.

   “The combination of Archie Jones’s working-class, Cockney accent, Samad’s Asian-English and Clara’s Creolized Caribbean English represent socio-linguistic deviations from Standard English as the centripetal forces of language undermining any notion of a homoglossic centre to the nation’s language and culture.”

3. (countable, uncountable)The state or result of having deviated; a transgression; an act of sin; an error; an offense.

   “mankind’s deviation from divine will”

4. (countable, uncountable)A detour in a road or railway.

   “"A rough place, my last district; sixty navvies on the Springbank deviation works, let alone eighty of these dole bugs to attend to."”

5. (countable, uncountable)A detour to one side of the originally-planned flightpath (for instance, to avoid weather); the act of making such a detour.

   “The flightcrew observed en route thunderstorms both visually and on the airplane's weather radar, so they requested and received clearance for a deviation to the left of course from the HNL Combined Center Radar Approach Control (CERAP).”

6. (countable, uncountable)The voluntary and unnecessary departure of a ship from, or delay in, the regular and usual course of the specific voyage insured, thus releasing the underwriters from their responsibility.
7. (countable, uncountable)The shortest distance between the center of the target and the point where a projectile hits or bursts.
8. (countable, uncountable)For interval variables and ratio variables, a measure of difference between the observed value and the mean.
9. (countable, uncountable)The signed difference between a value and its reference value.