[mass noun]a mental condition characterized by delusions of persecution, unwarranted jealousy, or exaggerated self-importance, typically worked into an organized system. It may be an aspect of chronic personality disorder, of drug abuse, or of a serious condition such as schizophrenia in which the person loses touch with reality 妄想狂,偏执狂 ■suspicion and mistrust of people or their actions without evidence or justification 多疑症