Disorder may refer to

randomness In common usage, randomness is the apparent or actual lack of pattern or predictability in events. A random sequence of events, symbols or steps often has no order and does not follow an intelligible pattern or combination. Individual rand ...

, non-order, or no intelligible pattern. Disorder may also refer to:

Healthcare

Disorder (medicine) A disease is a particular abnormal condition that negatively affects the structure or function of all or part of an organism, and that is not immediately due to any external injury. Diseases are often known to be medical conditions that ar ...

, a functional abnormality or disturbance *

Mental disorder A mental disorder, also referred to as a mental illness or psychiatric disorder, is a behavioral or mental pattern that causes significant distress or impairment of personal functioning. Such features may be persistent, relapsing and remitti ...

or psychological disorder, a psychological pattern associated with distress or disability that occurs in an individual and is not a part of normal development or culture: :*

Anxiety disorder Anxiety disorders are a cluster of mental disorders characterized by significant and uncontrollable feelings of anxiety and fear such that a person's social, occupational, and personal function are significantly impaired. Anxiety may cause physi ...

, different forms of abnormal and pathological fear and anxiety :*

Conversion disorder Conversion disorder (CD), or functional neurologic symptom disorder, is a diagnostic category used in some psychiatric classification systems. It is sometimes applied to patients who present with neurological symptoms, such as numbness, blindness ...

, neurological symptoms such as numbness, blindness, paralysis, or fits, where no neurological explanation is possible :*

Obsessive–compulsive disorder Obsessive–compulsive disorder (OCD) is a mental and behavioral disorder in which an individual has intrusive thoughts and/or feels the need to perform certain routines repeatedly to the extent where it induces distress or impairs general ...

, an anxiety disorder characterized by repetitive behaviors aimed at reducing anxiety :*

Obsessive–compulsive personality disorder Obsessive–compulsive personality disorder (OCPD) is a cluster C personality disorder marked by an excessive need for orderliness and neatness. Symptoms are usually present by the time a person reaches adulthood, and are visible in a variety o ...

, obsession with perfection, rules, and organization :*

Personality disorder Personality disorders (PD) are a class of mental disorders characterized by enduring maladaptive patterns of behavior, cognition, and inner experience, exhibited across many contexts and deviating from those accepted by the individual's culture ...

, an enduring pattern of inner experience and behavior that deviates markedly from the expectations of the culture of the individual who exhibits it

Law enforcement

Civil disorder Civil disorder, also known as civil disturbance, civil unrest, or social unrest is a situation arising from a mass act of civil disobedience (such as a demonstration, riot, strike, or unlawful assembly) in which law enforcement has difficulty ...

, one or more forms of disturbance caused by a group of people *

Lawlessness Lawlessness is a lack of law, in any of the various senses of that word. Lawlessness may describe various conditions. In society Anomie is a breakdown of social bonds between an individual and their community, in which individuals do not feel bo ...

, a lack of laws or law enforcement

Science

Crystallographic disorder In X-ray crystallography, crystallographic disorder describes the cocrystallization of more than one rotamer, conformer, or isomer In chemistry, isomers are molecules or polyatomic ions with identical molecular formulae – that is, same numbe ...

, disordered atom locations in crystals *

Order and disorder In physics, the terms order and disorder designate the presence or absence of some symmetry or correlation in a many-particle system. In condensed matter physics, systems typically are ordered at low temperatures; upon heating, they undergo one o ...

Arts, entertainment, and media

Films

* ''Disorder'' (1962 film), a film by Franco Brusati * ''Disorder'' (2009 film), a Chinese documentary * ''Disorder'' (2015 film), a French film

Music

Disorder (band) Disorder are an English street punk band that formed in the Bristol area of England in 1980, and has existed with varying line-ups. They are aligned with politically charged punk bands.Ankeny, JasonDisorder overview, AllMusic Disorder were pa ...

, a Bristol-based hardcore punk band * ''Disorder'' (album), an album by The Gazette * ''Disorder'' (EP), an EP by Front Line Assembly * "Disorder", a song by Joy Division from the 1979 album ''

Unknown Pleasures ''Unknown Pleasures'' is the debut studio album by English rock band Joy Division, released on 15 June 1979 by Factory Records. The album was recorded and mixed over three successive weekends at Stockport's Strawberry Studios in April 1979, wit ...

Other uses

* Dis-order, the mail order service of

Displeased Records Displeased Records was a Dutch independent record label An independent record label (or indie label) is a record label that operates without the funding or distribution of major record labels; they are a type of small- to medium-sized enterp ...