[ih-rash-uh-nl-iz-uh m]


irrationality in thought or action.
an attitude or belief having a nonrational basis.
a theory that nonrational forces govern the universe.

Nearby words

  1. irradiate,
  2. irradiation,
  3. irradicable,
  4. irrational,
  5. irrational number,
  6. irrationality,
  7. irrationalize,
  8. irrawaddy,
  9. irreal,
  10. irreality

Origin of irrationalism

First recorded in 1805–15; irrational + -ism

Related formsir·ra·tion·al·ist, adjective, nounir·ra·tion·al·is·tic, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for irrationalism

  • Classical empiricism results in irrationalism; perhaps it would even be fitting to designate it by this latter name.

  • His contention that they cannot be reasoned about has led to the further charge of irrationalism.

    Rudolph Eucken|Abel J. Jones
  • Thus the objection of "irrationalism" directed against the new philosophy falls to the ground.