/ ˈpærənɔɪd; NAmE / adjective , noun
■ adjective (also less frequent para·noiac / ˌpærəˈnɔɪɪk; NAmE ; -ˈnɔɪæk/)
1.
afraid or suspicious of other people and believing that they are trying to harm you, in a way that is not reasonable :
She's getting really paranoid about what other people say about her.
➡ note at afraid
2.
suffering from a mental illness in which you wrongly believe that other people are trying to harm you or that you are very important :
paranoid delusions
paranoid schizophrenia
a paranoid killer
■ noun
(also para·noiac /ˌpærəˈnɔɪɪk; -ˈnɔɪæk/) a person who suffers from paranoia