1. Resembling, characteristic of, or affected with paranoia.
2. Exhibiting or characterized by extreme and irrational fear or distrust of others: "He had a paranoid suspicion that government agents were listening to his phone calls."

A mental disorder characterized by an impaired sense of reality and persistent delusions.

1. Suspicious thinking that is persecutory, accompanied by feelings that one is being harassed, treated wrongly, or being judged critically.
2. An exaggerated, sometimes grandiose, belief or suspicion that the person is being harassed, persecuted, or treated unfairly.

A psychiatric disorder characterized by extreme suspicion and distrust of others to the degree that he/she blames them for her/his mistakes and failures and goes to abnormal lengths to validate prejudices, attitudes, or biases.

A psychopathological condition that may be associaed with delirium or dementia and characterized by the gradual formation of delusions, usually of a persecutory nature and often accompanied by related hallucinations.

An individual who has fixed systematized delusions, is suspicious, has a persecution complex, is resentful and bitter, and is a megalomaniac (mental condition where the patient exhibits delusions of grandeur or a greatly enhanced opinion of himself/herself).

A form of schizophrenia characterized by a persistent preoccupation with illogical, absurd, and changeable delusions; usually, of a persecutory, grandiose, or jealous nature, accompanied by related hallucinations.

The symptoms include extreme anxiety, exaggerated suspiciousness, aggressiveness, anger, argumentativeness, and hostility, which may lead to violence.

A transitory abnormal mental condition characterized by illogical thought processes and generalized suspicion and distrust, with a tendency toward persecutory ideas or delusions.