A belief in something that is too central to the holder's identity and sense of psychic well-being to relinquish, even in the face of compelling evidence.
Extreme beliefs are a sign of egomania and insanity.
That guy over there has an extreme belief that the Cubs are the best baseball team ever.
That guy over there has an extreme belief that the Cubs are the best baseball team ever.
by Jaochai November 2, 2005