1. The quality of being alien or foreign
   "His alienism was evident in his unfamiliarity with local customs";
   - alienage
    
2. [archaic] An obsolete term for the study and treatment of mental illness
   "In the 19th century, alienism was the precursor to modern psychiatry"

Derived forms: alienisms

Type of: curiousness, foreignness, psychiatry, psychological medicine, psychopathology, strangeness

Encyclopedia: Alienism