Meaning of lunacy
Pronunciation: (l'nu-sē), [key]
— pl. -cies.
- insanity; mental disorder.
- intermittent insanity, formerly believed to be related to phases of the moon.
- extreme foolishness or an instance of it: Her decision to resign was sheer lunacy.
- unsoundness of mind sufficient to incapacitate one for civil transactions.
- lunacy (Thesaurus)