Definition of alienism in English:

alienism

noun

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

  • 2The 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/