Main Entry: ir·ra·tio·nal·ism

Pronunciation: \i-ˈra-sh(ə-)nə-ˌli-zəm\

Function: noun

Date: 1811

1 : a system emphasizing intuition, instinct, feeling, or faith rather than reason or holding that the universe is governed by irrational forces
2 : the quality or state of being irrational

— ir·ra·tio·nal·ist \-list\ noun or adjective

— ir·ra·tio·nal·is·tic \-ˌra-sh(ə-)nə-ˈlis-tik\ adjective