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 disability that occurs in a person and is not a part of normal development or culture: :* Anxiety disorder, different forms of abnormal and pathological fear and anxiety :* Attention-deficit hyperactivity disorder :* Autism spectrum disorder :* Conversion disorder, neurological symptoms such as numbness, blindness, paralysis, or fits, where no neurological explanation is possible :* Obsessive–compulsive disorder, an anxiety disorder characterized by repetitive behaviors aimed at reducing anxiety :* Obsessive–compulsive personality disorder, obsession with perfection, rules, and organization :* Personality disorder, 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", a song by Joy Division from the 1979 album '' Unknown Pleasures'' * ''Disorder'' (EP), an EP by Front Line Assembly * Disorder, 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