Delusion
The Cyclopedic Law Dictionary · Walter A. Shumaker and George Foster Longsdorf; ed. James C. Cahill · 1922
The Cyclopedic Law Dictionary
In medical jurisprudence. A diseased state of the mind, in which persons believe things to exist which exist only, or in the degree they are conceived of only, in their own imaginations, with a persuasion so fixed and firm that neither evidence nor argument can convince them to the contrary.