disorder (disorders plural )
1 n-var A disorder is a problem or illness which affects someone's mind or body.
usu with supp
(=complaint)
...a rare nerve disorder that can cause paralysis of the arms.
2 n-uncount Disorder is a state of being untidy, badly prepared, or badly organized.
oft in N
(=confusion)
The emergency room was in disorder...
3 n-var Disorder is violence or rioting in public. usu supp N
(=unrest) He called on the authorities to stop public disorder...
attention deficit disorder
Attention deficit disorder is a condition where people, especially children, are unable to concentrate on anything for very long and so find it difficult to learn and often behave in inappropriate ways. The abbreviation ADD is often used. n-uncount
attention deficit hyperactivity disorder
Attention deficit hyperactivity disorder is a condition where people, especially children, are extremely active and unable to concentrate on anything for very long, with the result that they find it difficult to learn and often behave in inappropriate ways. The abbreviation ADHD is often used. n-uncount
obsessive-compulsive disorder
If someone suffers from obsessive-compulsive disorder, they cannot stop doing a particular thing, for example washing their hands. n-uncount
post-traumatic stress disorder
Post-traumatic stress disorder is a mental illness that can develop after someone has been involved in a very bad experience such as a war. (MEDICAL) n-uncount
seasonal affective disorder
Seasonal affective disorder is a feeling of tiredness and sadness that some people have during the autumn and winter when there is very little sunshine. The abbreviation SAD is often used. n-uncount
