DEVIATION

[de.vi.a.tion] n (15c): an act or instance of deviating: as a: deflection of the needle of a compass caused by local magnetic influences (as in a ship) b: the difference between a value in a frequency distribution and a fixed number (as the mean) c: departure from an established ideology or party line d: noticeable or marked departure from accepted norms of behavior -- de.vi.a.tion.ism n -- de.vi.a.tion.ist n or adj