Meaning of the word lunacy in English

What does lunacy mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

lunacy

US /ˈluː.nə.sɪ/
UK /ˈluː.nə.sɪ/

Noun

1.

stupid behavior that will have bad results:

Example:
It would be lunacy to try to climb the mountain in this weather.
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