Improve your students' vocabulary with a word for every month and activities to go with it!
1. 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.
2. Serious mental illness, insanity
His family has a history of madness.
Definition from the Longman Dictionary of Contemporary English 6th Edition.