Suffering from or characterized by delusions(adjective)
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Use "delusional" in a sentence
"The term delusional disorder was suggested by Winokur 1072 to avoid the confusion resulting from the diverse concepts of paranoia and the ambiguity of that term, which has been used to denote insanity, suspiciousness, persecutory or grandiose delusions, schizophrenia, and a specific disease entity distinct from other psychoses."
"Many of us have been raised with what I call delusional thought patterns."
"Hoodathunk (sponsored by the FSM, Noodles for Freedom!) says: the cranial butt plug is smelling more and more like a certain delusional physician."