/,pærə'nɔɪə; ,pærə`nɔɪə/
n [U]
1 mental illness in which a person is obsessed by mistaken beliefs, esp that he is being badly treated by others or that he is somebody very important 偏执狂; 妄想狂.
2 (infml 口) abnormal tendency to suspect and mistrust other people 多疑.

n[U]
[Date: 1800-1900; Language: Greek;Origin:'mental illness', from para- ( PARA-) + nous 'mind']
an unreasonable belief that you cannot trust other people, or that they are trying to harm you or have a bad opinion of you
medical a mental illness that makes someone believe that they are very important and that people hate them and are trying to harm them