Definition of alienism in English:

alienism

noun

  • 1North American
    Originally North American. The fact of being a foreigner; alien status or character; otherness.

  • 2historical
    The study of mental disorders and their treatment; the branch of medicine dealing with this; = psychiatry. Now historical.

Origin

Late 18th century. From either alien or alien + -ism.

Pronunciation

alienism

/ˈeɪlɪənɪz(ə)m/