Deviation

The act of deviating; a wandering from the way; variation from the common way, from an established rule, etc.; departure, as from the right course or the path of duty.

The state or result of having deviated; a transgression; an act of sin; an error; an offense.

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.

the error of a compass due to local magnetic disturbances

the difference between an observed value and the expected value of a variable or function

deviate behavior