=====Mental Illness=====
"[[Psychosis]]" is a term originally used in '''[[psychiatry|clinical psychiatry]]''' to refer to '''mental illness''' ''in general''.
=====Neurosis=====In [[psychiatry]], the term is originally used to describe any ''severe'' form of '''mental illness'',
In [[psychoanalysis]], however, "[[psychosis]]" is often used to describe a ''severe'' form of '''mental illness'', while "'''[[neurosis]]'''" is used to describe ''less severe'' forms.
