lunacy

UK
/ˈluː.nə.si/
US
/ˈluː.nə.si/
lunacynoun
lunacies
pl
Translations
The decision to climb the mountain in winter was sheer lunacy.
Решение подняться на гору зимой было чистым безумием.
His plan to quit his job without another lined up seemed like lunacy.
Его план уволиться с работы без другой на примете казался сумасшествием.
Definitions
Severe mental illness; insanity (originally thought to vary with the phases of the moon).
In the 19th century, patients suffering from lunacy were often committed to asylums.
Extreme foolishness or a wildly imprudent act.
Quitting his secure job without another offer lined up was pure lunacy.
lunacyadjective
UK
/ˈluː.nə.si/
US
/ˈluː.nə.si/
Used attributively before another noun (e.g., "lunacy laws"), functioning as an adjective.
Definitions
Relating to or intended for people considered insane; pertaining to lunacy.
The committee reviewed the outdated lunacy laws still on the books.