Medical Definition of obsessive–compulsive disorder
: an anxiety disorder characterized by recurrent obsessions or compulsions or both that cause significant distress, are time-consuming or interfere with normal daily functioning, and are recognized by the individual affected as excessive or unreasonable Obsessive-compulsive disorder is a chronic illness characterized by recurrent intrusive and disabling thoughts (obsessions) and repetitive stereotypical behavior (compulsions) that a person feels driven to perform.—Robert Michels and Peter M. Marzuk, The New England Journal of Medicine, 26 Aug. 1993—abbreviation OCD
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