1
: the status of a noncitizen : alienage
We enjoyed our alienism, our difference in speech and habits, the curiosity which we engendered.Mary Ellen Chase
2
dated : the study and treatment of mental, emotional, and behavioral disorders : psychiatry
The nineteenth century—coinciding with the development of alienism, now known as psychiatry—saw the increased growth of institutions intended for the housing and medical treatment of the "insane."Joe Nickell

Word History

Etymology

alien entry 2 + -ism

First Known Use

1783, in the meaning defined at sense 1

Time Traveler
The first known use of alienism was in 1783

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Cite this Entry

“Alienism.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/alienism. Accessed 30 Aug. 2026.

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