millennialism

[mi-len-ee-uh-liz-uh m]

Origin of millennialism

First recorded in 1905–10; millennial + -ism
Also called mil·le·nar·i·an·ism [mil-uh-nair-ee-uh-niz-uh m] /ˌmɪl əˈnɛər i əˌnɪz əm/.
Related formsmil·len·ni·al·ist, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Word Origin and History for millennialism
n.

1906, from millennial + -ism.

Online Etymology Dictionary, © 2010 Douglas Harper