delusion

/dษชหˆl(j)uหzjษ™n/
noun
  1. 1

    A false belief that is resistant to confrontation with actual facts.

  2. 2

    The state of being deluded or misled, or process of deluding somebody.

    โ€œIt is far better to grasp the universe as it really is than to persist in delusion, however satisfying and reassuring.โ€

  3. 3

    That which is falsely or delusively believed or propagated; false belief; error in belief.

Source: https://en.wiktionary.org/wiki/delusion