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paranoia

1 ENTRIES FOUND:
paranoia /ˌperəˈnojə/ noun
paranoia
/ˌperəˈnojə/
noun
Britannica Dictionary definition of PARANOIA
[noncount]
medical : a serious mental illness that causes you to falsely believe that other people are trying to harm you
: an unreasonable feeling that people are trying to harm you, do not like you, etc.