madness definition, meaning - what is madness in the British English Dictionary & Thesaurus - Cambridge Dictionaries Online

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English definition of “madness”

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madness

noun [U] uk   us   /ˈmæd.nəs/

madness noun [U] (STUPID BEHAVIOUR)

stupid or dangerous behaviour: To begin a war would be sheer madness.

madness noun [U] (MENTAL ILLNESS)

the state of being mentally ill, or unable to behave in a reasonable way: She felt as if she were sliding into madness.
(Definition of madness from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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