verb

depart from an established course.

you must not deviate from the agreed route

diverge,digress,drift,stray,slew,veer,swerve,turn away,turn aside,get sidetracked,branch off,differ,vary,change,depart,be different,be at variance with,run counter to,contrast with,contravene,contradict,divagate

noun

another term for deviant (noun).

the whole affair offers revealing insights into attitudes towards ‘sexual deviates’

adjective

departing from usual or accepted standards; deviant.

their deviate behaviour