paranoid

American  

[par-uh-noid] / ˈpær əˌnɔɪd /

Archaic, paranoiac;

adjective

1. of, like, or experiencing paranoia.

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noun

1. a person with paranoia.

paranoid British  

/ ˈpærəˌnɔɪd /

adjective

1. of, characterized by, or resembling paranoia

2. informal exhibiting undue suspicion, fear of persecution, etc

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noun

1. a person who shows the behaviour patterns associated with paranoia

Usage

What does paranoid mean? Paranoid is an adjective used to describe someone who has the mental disorder paranoia, which is characterized by delusions and feelings of extreme distrust, suspicion, and being targeted by others. Such thoughts and actions can also be described as paranoid. Paranoid is also commonly used more generally to mean overly suspicious or irrationally distrustful of others. It’s important to understand that while paranoid is used generally outside of its psychiatric usage in a way that makes it seem less serious, being paranoid is a major symptom of disorders like paranoid schizophrenia and paranoid personality disorder. Example: Just because I lock my doors at night doesn’t mean I’m being paranoid—it just means I’m being cautious.

Etymology

Origin of paranoid

First recorded in 1900–05; paranoi(a) + -oid, with base and suffix merged, perhaps by shortening of the expected but unrecorded paranoioid

Explanation

Someone who is paranoid has an irrational and obsessive distrust of others, like your paranoid friend who worries that everyone from the principal to the neighborhood pre-schoolers are out to get him. A paranoid person suffers from paranoia, the unreasonable fear or irrational belief that other people are plotting to harm him or her. How can you spot paranoid people? They tend to obsess over other people talking about them. They believe there are no accidents or coincidences — the cafeteria running out of fries just as they reach the front of the line — just plans to hurt, embarrass, or otherwise bring them down.

Example Sentences

It might seem odd that the man who wrote a book called “Only the Paranoid Survive” was also writing in a diary.

From The Wall Street Journal • May 9, 2026

Ms. Nelson is the singer-songwriter for the Paranoid Style and writes on books, film, music and sports for numerous publications.

From The Wall Street Journal • Apr. 17, 2026

Further success followed with a string of best-selling albums including Paranoid, Master of Reality and Volume 4, all of which sold more than a million copies.

From BBC • Jul. 22, 2025

"She got Paranoid on seven inch and it got passed down to my mum, and now it's passed down to me. It's going through the family."

From BBC • Jul. 2, 2025

Paranoid got tacked on about a year later, after I verbally attacked a librarian for trying to hand me propaganda pamphlets for an underground Communist force operating out of the basement of the public library.

From "Made You Up" by Francesca Zappia