of, like, or suffering from paranoia.


a person suffering from paranoia.

Also par·a·noi·ac [par-uh-noi-ak, -ik] /ˌpær əˈnɔɪ æk, -ɪk/, par·a·noe·ac [par-uh-nee-ak, -ik] /ˌpær əˈni æk, -ɪk/.

Origin of paranoid

1900–05; paranoi(a) + -oid, with base and suffix merged, perhaps by haplology from the expected *paranoioid Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Related Words for paranoid


Examples from the Web for paranoid

Contemporary Examples of paranoid

Historical Examples of paranoid

  • He was the one to blame; he'd known Dorflay's paranoid condition for years.

    Ministry of Disturbance

    Henry Beam Piper

  • But a paranoid Talent could think of them, and know that they were true.

    Talents, Incorporated

    William Fitzgerald Jenkins

  • He has all the tendencies to suspicion that a paranoid personality has.

    Talents, Incorporated

    William Fitzgerald Jenkins

  • Knowing this, they are also paranoid but, as distinct from the classic pathology, they do have enemies.

    After the Rain

    Sam Vaknin

  • Even if it's a paranoid constitutional inferior like Jimmy's father.

    The Syndic

    C.M. Kornbluth

British Dictionary definitions for paranoid



of, characterized by, or resembling paranoia
informal exhibiting undue suspicion, fear of persecution, etc


a person who shows the behaviour patterns associated with paranoia
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for paranoid

1901, irregularly formed from paranoia + -oid. As a noun, "a paranoid person," attested from 1922.

Online Etymology Dictionary, © 2010 Douglas Harper

paranoid in Medicine




Relating to, characteristic of, or affected with paranoia.


One affected with paranoia.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.