01 n. A functional nervous affection or disease, that is, a disease of the nerves without any appreciable change of nerve structure.
-
1.
A functional nervous affection or disease, that is, a disease of the nerves without any appreciable change of nerve structure.(Med.)
-
2.
a mental or emotional disorder that affects only part of the personality, and involves less distorted perceptions of reality than a psychosis. As used in medicine, anxiety is a prominent characteristic, and the condition may be accompanied by psychosomatic symptoms. Phobias and compulsive behavior are common varieties.(Psychiatry)