Delusion \De*lu"sion\n. [L. delusio, fr. deludere. See Delude.]
1. The act of deluding; deception; a misleading of the mind. --Pope.
2. The state of being deluded or misled.
3. That which is falsely or delusively believed or propagated; false belief; error in belief.
And fondly mourned the dear delusion gone. --Prior.
Syn: Delusion, Illusion.
Usage: These words both imply some deception practiced upon the mind. Delusion is deception from want of knowledge; illusion is deception from morbid imagination. An illusion is a false show, a mere cheat on the fancy or senses. It is, in other words, some idea or image presented to the bodily or mental vision which does not exist in reality. A delusion is a false judgment, usually affecting the real concerns of life.
Psychosis \Psy*cho"sis\, n. [NL. See Psycho-.]
1. Any vital action or activity. --Mivart.
2. (Med.) A disease of the mind; especially, a functional mental disorder, that is, one unattended with evident organic changes.
Pathologic \Path`o*log"ic\, Pathological \Path`o*log"ic*al\, a. (Med.) Morbid; due to disease; abnormal; as, pathological tissue; a pathological condition.
Absolutely.
Delusional. Psychotic.
Threat of harm to self and others.