Deviation \De`vi*a"tion\, n. [LL. deviatio: cf. F. d['e]viation.]

1. 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.

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

Source: Webster's Revised Unabridged Dictionary (1913)