— delusional, delusionary , adj.
/di looh"zheuhn/ , n.
1. an act or instance of deluding.
2. the state of being deluded.
3. a false belief or opinion: delusions of grandeur.
4. Psychiatry. a fixed false belief that is resistant to reason or confrontation with actual fact: a paranoid delusion.
[ 1375-1425; late ME delusion- (s. of delusio ), equiv. to delus ( us ) (ptp. of deludere; see DELUDE) + -ion- -ION ]
Syn. 1. deception. See illusion .