1.A mental condition, present from early childhood, characterized by great difficulty in communicating and forming relationships, and in... 2.A mental condition in which fantasy dominates over reality, as a symptom of schizophrenia and other disorders.
Autism is classified as a mental disorder that is usually diagnosed in early childhood. The cause(s) are unclear but it does seem to have a genetic basis at least in part. Children often communicate poorly...may be non verbal....avoid interaction and contact with others, and may show repetitive behavior including odd mannerisms or a fascination with inanimate objects. The Symptom of autism may pertain to other mental disorders as well and means the person is internally focused and detached from the world around them