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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.

Keep Reading on Vocabulary.com

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.

See Examples For:

Ken Skates said he sought help after his symptoms were at their most severe while studying at the University of Cambridge and he was eventually diagnosed with generalised anxiety disorder and depression.

From BBC Aug. 15, 2026

Robert Carradine, best known for the 1980s “Nerds” movies, struggled with bipolar disorder for years, his family said in a statement.

From Los Angeles Times Aug. 15, 2026

Few people then, not even Carpenter’s closest confidantes, knew how to talk about what was actually an eating disorder, much less manage it.

From Salon Aug. 13, 2026

This loss can occur after brain injuries and in autoimmune diseases such as the rare neuromyelitis optica spectrum disorder, in which the body's own antibodies attack and destroy astrocytes.

From Science Daily Aug. 12, 2026

Habit ruleth like a task-master returned from the grave; I could not leave the unneeded volumes in disorder.

From "The Astonishing Life of Octavian Nothing, Traitor to the Nation, Volume II: The Kingdom on the Waves" by M.T. Anderson

Indole metabolites have been connected to a wide range of diseases, including inflammatory bowel disease, neurodegenerative disorders, and cancer.

From Science Daily Aug. 15, 2026

The French government had promoted the ban as a way to better protect young people from the harmful effects associated with social media platforms, including anxiety, depression, sleep disorders and online harassment.

From Barron's Aug. 14, 2026

Early is interested in the sickly vanity of eating disorders and conceptual femininity, and he explores the danger of these illnesses through a lens that is both uneasy and unique to his film.

From Salon Aug. 8, 2026

I will be screened for a range of different conditions, including skin cancer, cardiovascular disease, type 2 diabetes, eye conditions like glaucoma, as well as kidney and blood disorders.

From BBC Aug. 8, 2026

Is it any wonder Americans suffer from so many eating disorders?

From "The Omnivore's Dilemma" by Michael Pollan

With a major career milestone within her reach and increased appearances in front of the camera, the sudden pressures on Maddie trigger long-hidden patterns of disordered eating: bingeing and purging, secrets and lies.

From Salon Aug. 8, 2026

Light can be disordered in one characteristic, such as the directions in which it travels, while still creating photons that are entangled through another characteristic, such as polarization.

From Science Daily Aug. 8, 2026

Like all grieving, it is complicated and disordered, and beautifully so.

From Salon Jul. 24, 2026

Jessica Scheer, CEO of National Eating Disorders Association, said the organization has heard that some providers don’t screen for a history of disordered eating before prescribing GLP-1s.

From The Wall Street Journal Jul. 20, 2026

Shuffle the cards and you put them in a disordered state.

From "A Short History of Nearly Everything" by Bill Bryson

The researchers then expose the cilia to a damped, alternating magnetic field which has the effect of disordering the magnetization of the microparticles.

From Science Daily Apr. 24, 2024

The economic and social troubles of 1993 rippled through my community, as these things do, disordering the trajectories of lives and industries to the ruin of some.

From Los Angeles Times Dec. 28, 2021

But there will be many pairs of events that are causally related, that will end up far from each other—thus disordering space and locality.

From Scientific American Apr. 4, 2019

Furthermore, disordering the ligand distribution drastically increases adhesion growth, but reduces the rigidity threshold for adhesion collapse.

From Nature Dec. 5, 2017

But the vapour of a limekiln would come between me and them, disordering them all, and it was through the vapour at last that I saw two men looking at me.

From "Great Expectations" by Charles Dickens

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