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disorder

American  
[dis-awr-der] / dɪsˈɔr dər /

noun

disorders plural
  1. lack of order or regular arrangement; confusion.

    Your room is in utter disorder.

    Synonyms:
    clutter, litter, jumble, disarray, disorderliness
  2. an irregularity.

    a disorder in legal proceedings.

  3. breach of order; disorderly conduct; public disturbance.

    Synonyms:
    turbulence, riot
  4. a disturbance in physical or mental health or functions; malady or dysfunction.

    a mild stomach disorder.

    Synonyms:
    indisposition, sickness, complaint, illness, malady, ailment

verb (used with object)

disorders, present (3rd person singular) disordered, past participle, past disordering present participle
  1. to destroy the order or regular arrangement of; disarrange.

    Synonyms:
    disorganize, disarray
  2. to derange the physical or mental health or functions of.

    Synonyms:
    confuse, upset, disturb
disorder British  
/ dɪsˈɔːdə /

noun

  1. a lack of order; disarray; confusion

  2. a disturbance of public order or peace

  3. an upset of health; ailment

  4. a deviation from the normal system or order

"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

verb

  1. to upset the order of; disarrange; muddle

  2. to disturb the health or mind of

"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

Synonym Usage

Disorder, brawl, disturbance, uproar are disruptions or interruptions of a peaceful situation. Disorder refers to civil unrest or to any scene in which there is confusion or fighting: The police went to the scene of the disorder. A brawl is a noisy, unseemly quarrel, usually in a public place: a tavern brawl. A disturbance is disorder of a size as to inconvenience people: to cause a disturbance. An uproar is a tumult, a bustle and clamor of many voices, often because of a disturbance: a mighty uproar.

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Etymology

Origin of disorder

First recorded in 1470–80; dis- 1 + order

Explanation

Disorder is a lack of order — in other words, chaos, clutter, and general disarray. If everyone in your class is yelling and throwing things, there's no order: there's disorder. If all the library books are out of order and thrown sloppily on the shelf, that's disorder, too. If you mess or mix something up, you're disordering it. Many medical conditions and diseases are also called disorders, like post-traumatic stress disorder. Whenever there's disorder, something is wrong or out of whack.

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Vocabulary lists containing disorder

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Dr. Michael Lutter, a Texas-based psychiatrist, has been prescribing GLP-1s for some patients with bulimia and binge-eating disorder for years, particularly those who have tried and failed with other treatments.

From The Wall Street Journal • Jul. 8, 2026

In “God Knows Where I Am,” Linda Bishop, diagnosed variously as having “bipolar disorder with psychosis” or schizoaffective disorder, drifts “between shelters, hospitals, and jail” before finding refuge in a deserted farmhouse.

From Los Angeles Times • Jul. 8, 2026

Crinetics primarily develops products to treat endocrine disorders, including acromegaly, a rare hormonal disorder caused by the overproduction of growth hormone, and congenital adrenal hyperplasia, a condition that affects the adrenal glands.

From The Wall Street Journal • Jul. 6, 2026

The prosecution suggested that the disorder which broke out had been deliberately orchestrated by dissident republicans to coincide with the presence of MTV.

From BBC • Jul. 3, 2026

Great waggons were standing in disorder in a field beaten bare of grass.

From "The Return of the King" by J.R.R. Tolkien

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