Longman Dictionary of Contemporary English homepage

madness

 noun
     
mad‧ness [uncountable]
1 especially British English very stupid behaviour that could be dangerous or have a very bad effect
it is madness (for somebody) to do something
It would be madness to drive all that way on your own.
Cutting down the forest is sheer madness (=completely crazy).
2 serious mental illness [= insanity]:
His family has a history of madness.
3

moment/fit of madness

when someone does something without thinking clearly:
In a moment of madness, I agreed to have the party at my house.

➔ there's method in/to somebody's madness

at method (3)
Definition from the Longman Dictionary of Contemporary English
Advanced Learner's Dictionary.

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