Disorder may refer to

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

, a lack of intelligible pattern, or:

Healthcare

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

, a functional abnormality or disturbance *

Mental disorder A mental disorder, also referred to as a mental illness, a mental health condition, or a psychiatric disability, is a behavioral or mental pattern that causes significant distress or impairment of personal functioning. A mental disorder is ...

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

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

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

Attention-deficit hyperactivity disorder Attention deficit hyperactivity disorder (ADHD) is a neurodevelopmental disorder characterised by symptoms of inattention, hyperactivity, impulsivity, and emotional dysregulation that are excessive and pervasive, impairing in multiple con ...

Autism spectrum disorder Autism, also known as autism spectrum disorder (ASD), is a neurodevelopmental disorder characterized by differences or difficulties in social communication and interaction, a preference for predictability and routine, sensory processing di ...

Conversion disorder Conversion disorder (CD) was a formerly diagnosed psychiatric disorder characterized by abnormal sensory experiences and movement problems during periods of high psychological stress. Individuals diagnosed with CD presented with highly distressin ...

, 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 disorder in which an individual has intrusive thoughts (an ''obsession'') and feels the need to perform certain routines (''Compulsive behavior, compulsions'') repeatedly to relieve the dis ...

, 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 a spectrum of obsessions with rules, lists, schedules, and order, among other things. Symptoms are usually present by the time a person reaches a ...

, obsession with perfection, rules, and organization :*

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

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

Law enforcement

Civil disorder Civil disorder, also known as civil disturbance, civil unrest, civil strife, or turmoil, are situations when law enforcement and security forces struggle to Public order policing, maintain public order or tranquility. Causes Any number of thin ...

, one or more forms of disturbance caused by a group of people * Lawlessness, a lack of laws or law enforcement

Science

* Crystallographic disorder, disordered

atom Atoms are the basic particles of the chemical elements. An atom consists of a atomic nucleus, nucleus of protons and generally neutrons, surrounded by an electromagnetically bound swarm of electrons. The chemical elements are distinguished fr ...

locations in crystals * Order and disorder

Arts, entertainment, and media

Films

* ''Disorder'' (1962 film), a film by Franco Brusati *''Disorder'' (2006 film), a psychological thriller by Jack Thomas Smith * ''Disorder'' (2009 film), a Chinese documentary * ''Disorder'' (2015 film), a French film

Music

* "

Disorder Disorder may refer to randomness, a lack of intelligible pattern, or: Healthcare * Disorder (medicine), a functional abnormality or disturbance * Mental disorder or psychological disorder, a psychological pattern associated with distress or disab ...

", a song by

Joy Division Joy Division were an English Rock music, rock band formed in Salford in 1976. The group consisted of vocalist, guitarist and lyricist Ian Curtis, guitarist and keyboardist Bernard Sumner, bassist Peter Hook and drummer Stephen Morris (musici ...

from the 1979 album ''

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

'' * ''Disorder'' (EP), an EP by

Front Line Assembly Front Line Assembly (FLA) is a Canadian electro-industrial band formed by Bill Leeb in 1986 in music, 1986 after leaving Skinny Puppy. FLA has developed its own sound incorporating elements of electronic body music and electro-industrial. The ba ...

, a Bristol-based

hardcore punk Hardcore punk (commonly abbreviated to hardcore or hXc) is a punk rock music genre#subtypes, subgenre and subculture that originated in the late 1970s. It is generally faster, harder, and more aggressive than other forms of punk rock. Its roots ...

band * ''Disorder'' (album), an album by The Gazette

Mail order

* Dis-order, the mail order service of

Displeased Records Displeased Records was a Dutch independent record label, founded by Lars Eikema and Ron Veltkamp. The label had many Dutch and other extreme metal bands on its roster, but has also re-released albums by Agathocles (band), Agathocles, Cryptopsy, In ...