What does paranoia mean?
Paranoia denotes persistent, excessive, or irrational suspicion that other people are hostile, deceptive, or seeking to harm the person concerned. It can describe a general state of mistrust, as when financial or online information is treated as evidence of a hidden plot, or a pattern of persecutory thinking in which someone believes that they are being watched, threatened, or sabotaged. The word often carries a strongly negative connotation because such suspicion is commonly understood as distorted or unsupported by evidence. In clinical discussion, however, paranoia may refer more specifically to delusional beliefs that extend beyond ordinary worry or mistrust. The adjective paranoid is related and is used for people, theories, behaviors, and states of mind associated with such fears. Understanding the distinction matters because ordinary vigilance or reasonable concern can be called suspicious, while paranoia specifically implies a pervasive and typically unfounded pattern of perceived threat.
nounA persistent and unreasonable belief that other people are hostile, deceptive, or intent on harming one. In clinical contexts, it may refer to a delusional pattern involving unfounded suspicions of persecution or betrayal.
- Persistent, excessive, and often unfounded suspicion of other people's harmful intentions.
- A clinical term for delusional thinking characterized by beliefs that one is being persecuted, watched, or betrayed.
"Her paranoia about being watched made it difficult for her to accept help from others."
"The unexplained warnings fueled his paranoia and convinced him that his colleagues were plotting against him."
"A clinician described the patient's paranoia as a fixed belief that strangers were directing her life through secret messages."
The plural is used when referring to separate instances of paranoid thinking or to different forms of paranoid belief.
"The novel explores the different paranoias that emerge when a community is told whom to distrust."
From a Greek word associated with a mind in a state beyond normal reason, modern paranoia still captures the conviction that danger is hiding just beyond the next corner.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does paranoia come from?
The word comes through Latin from Greek paranoia, a term associated with paranuein, meaning to be exceedingly troubled or distracted in mind. Its elements include the prefix para-, meaning beside or beyond, and nous, meaning mind. English adopted the word in the 17th century, initially in medical writing, and its later psychological meaning developed from ideas of mental disorder and disordered perception.
Related word forms
How paranoia is actually used
In ordinary usage, the word is typically pejorative and describes suspicion that is disproportionate to evidence. In psychiatric or neurological contexts, it may be used more clinically, although diagnoses require assessment by a qualified professional.
Easily confused with paranoia
Paranoia is a noun for persistent, unreasonable suspicion or persecutory thinking, while paranoid is primarily an adjective describing a person, state of mind, or theory characterized by such suspicion.