irrationalistic

irrationalism

[ih-rash-uh-nl-iz-uhm]
noun
1.
irrationality in thought or action.
2.
an attitude or belief having a nonrational basis.
3.
a theory that nonrational forces govern the universe.

Origin:
1805–15; irrational + -ism

irrationalist, adjective, noun
irrationalistic, adjective
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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