disorder

American  

[dis-awr-der] / dɪsˈɔr dər /

noun

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

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verb (used with object)

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

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verb

1. to upset the order of; disarrange; muddle

2. to disturb the health or mind of

Related Words

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.

Other Word Forms

• predisorder noun

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.

Example Sentences

Some local residents have long pressed leaders to act, saying that intrusive noise could worsen post-traumatic stress disorder and other ailments.

From Salon • Apr. 27, 2026

The researchers suggest that DEA could potentially be used as a biomarker to help identify certain cases of major depressive disorder.

From Science Daily • Apr. 25, 2026

Many of these medicines are aimed at patients for whom other treatments have failed, including military veterans who suffer from post-traumatic stress disorder.

From Barron's • Apr. 24, 2026

Robert Aramayo plays activist John Davidson in a film that brings an old-fashioned TV-movie quality to its depiction of life with the disorder.

From The Wall Street Journal • Apr. 23, 2026

It was in this state that I first heard the term bipolar disorder.

From "Educated" by Tara Westover

Related Words

• chaos
• complication
• disturbance
• lawlessness
• trouble
• unrest