Longman Dictionary of Contemporary English homepage

disorder

noun
     
dis‧or‧der W3
1 [countable] medicalMI a mental or physical illness which prevents part of your body from working properly
a mental/psychiatric disorder
people with mental disorders
severe eating disorders such as bulimia and anorexia
2 [uncountable]PP a situation in which a lot of people behave in an uncontrolled, noisy, or violent way in public
civil/public/crowd disorder
A number of stadiums were closed because of crowd disorder.
3 [uncountable] a situation in which things or people are very untidy or disorganized [≠ order]
in/into disorder
Everything was in disorder, but nothing seemed to be missing.
His whole system was thrown into disorder.

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