Longman Dictionary of Contemporary English homepage

paranoid

 adjective
     
Related topics: Psychology, Psychiatry
par‧a‧noid
1 believing unreasonably that you cannot trust other people, or that they are trying to harm you or have a bad opinion of you
be/become/get paranoid
Malcolm got really paranoid, deciding that there was a conspiracy out to get him.
paranoid about
He has always been paranoid about his personal security.
2MP medical suffering from a mental illness that makes you believe that other people are trying to harm you:
a patient suffering from paranoid schizophrenia
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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