WordWeb Online

1. Indirect in departing from the accepted or proper way; misleading
   "used devious means to achieve success";
   - oblique
    
2. Characterized by insincerity or deceit; evasive
   "a devious character";
   - shifty
    
3. Deviating from a straight course
   "a scenic but devious route";
   - circuitous, roundabout

See also: indirect, untrustworthy, untrusty

Encyclopedia: Devious