1/8/17 Illusion, Delusion, and Hallucination

Illusion Delusion Hallucination

An illusion is a deceptive appearance <the company’s profits turned out to be the illusion of a creative accountant>.
A delusion is an illusion with added elements of danger, self-deception, and prolonged influence <delusions of grandeur>. Delusion refers to an erroneous mental belief, whereas hallucination is an erroneous sensory perception <the drug induced colorful hallucinations>.