[mass noun](Psychiatry)a mental condition, present from early childhood, characterized by great difficulty in communicating and forming relationships with other people and in using language and abstract concepts (精神病学)孤独症,孤独癖 ■a mental condition in which fantasy dominates over reality, as a symptom of schizophrenia and other disorders 臆想,幻想(精神分裂的症状之一)