|a psychological disorder in which severe physical symptoms like blindness or paralysis appear with no apparent physical cause|
|a chattering or flighty, light-headed person.|
|a fool or simpleton; ninny.|
conversion disorder n.
A disorder involving the loss or alteration of physical functioning, such as paralysis, voice loss, tunnel vision, or seizures, that is the result of a psychological involvement or need rather than a physical illness or disease. Also called conversion hysteria, conversion hysteria neurosis, conversion reaction.