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obsessive

[uh b-ses-iv]
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adjective
  1. being, pertaining to, or resembling an obsession: an obsessive fear of illness.
  2. causing an obsession.
  3. excessive, especially extremely so.
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noun
  1. someone who has an obsession or obsessions; a person who thinks or behaves in an obsessive manner.
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Origin of obsessive

First recorded in 1910–15; obsess(ion) + -ive
Related formsob·ses·sive·ly, adverbob·ses·sive·ness, nounnon·ob·ses·sive, adjectivenon·ob·ses·sive·ly, adverbnon·ob·ses·sive·ness, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for obsessiveness

intolerance, zeal, bigotry, hatred, extremism, zealotry, madness, abandonment, dogma, unruliness, bias, infatuation, transport, stubbornness, obstinacy, passion, injustice, tenacity, partisanship, enthusiasm

British Dictionary definitions for obsessiveness

obsessive

adjective
  1. psychiatry motivated by a persistent overriding idea or impulse, often associated with anxiety and mental illness
  2. continually preoccupied with a particular activity, person, or thing
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noun
  1. psychiatry a person subject to obsession
  2. a person who is continually preoccupied with a particular activity, person, or thing
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Derived Formsobsessively, adverbobsessiveness, noun
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 obsessiveness

obsessive

adj.

1911, from obsess + -ive. Related: Obsessively. Obsessive-compulsive is attested from 1927.

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Online Etymology Dictionary, © 2010 Douglas Harper

obsessiveness in Medicine

obsessive

(əb-sĕsĭv, ŏb-)
adj.
  1. Of, characteristic of, or causing an obsession.
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Related formsob•sessive n.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.