DELUSION

noun Etymology: Middle English, from Late Latin ~-, delusio, from deludere Date: 15th century the act of deluding ; the state of being deluded, 2. something that is falsely or delusively believed or propagated, a persistent false psychotic belief regarding the self or persons or objects outside the self that is maintained despite indisputable evidence to the contrary, ~al adjective ~ary adjective Synonyms: see: ~