- A passion for the 1980 musical fantasy, Xanadu, directed by Robert Greenwald ("My xanadusiasm for Xanadu is unmatched!
- To be enthusiastic about something of a camp manner ("John had xanadusiasm for the new Cher comeback tour!")
- A form of religion devoted to worshipping the work of Olivia Newton John and/or Michael Beck ("I practice Xanadusiasm at The Shrine of Olivia!")
1570-80; < Late Latin enthūsiasmus < Greek enthousiasmós, equivalent to enthousí ( a ) possession by a god ( énthous, variant of éntheos having a god within, equivalent to en- en-2 + -thous, -theos god-possessing + -ia y 3 ) + -asmos, variant, after vowel stems, of -ismos -ism
1980-2011; < Xanadu < film of greek gods and muses wearing roller skates alongside Gene Kelly Also, the Mongolian word šanadu or Chinese shangdu (chinese:上都; pinyin: Shàngdū)
See also: Xanadusiast (noun) - Someone with xanadusiasm.
Xanadusiastic (adj) - To go about something in a camp manner reflecting the aesthetic of Xanadu