·noun The state of being deluded or misled.
II. Delusion ·noun The act of deluding; deception; a misleading of the mind.
III. Delusion ·noun That which is falsely or delusively believed or propagated; false belief; error in belief.
·noun The act of deluding one's self, or the state of being thus deluded. ...
Webster's Dictionary of the English Language