Meaning of “disorder” - Learner’s Dictionary

disorder

noun uk us /dɪˈsɔːdər/
ILLNESS [ C ]

a disease or mental problem:

a blood disorder
BAD BEHAVIOUR [ U ]

uncontrolled, bad behaviour, especially by large groups of people:

crime and disorder
NOT ORGANIZED [ U ]

a situation in which things are untidy or confused and not organized:

His financial affairs are in complete disorder.
→ See also eating disorder

(Definition of “disorder” from the Cambridge Learner’s Dictionary © Cambridge University Press)