- UK [ˈfɒlɪ] / US [ˈfɑlɪ]
Word forms "folly":
singular folly plural follies1) [countable/uncountable] formal a way of thinking or behaving that is stupid and careless, and likely to have bad resultsit is folly to do something:
The judge described the incident as an act of folly.the folly of (doing) something:
It is absolute folly to go mountain climbing without the proper equipment.
She soon realized the folly of her actions.
I pointed out the folly of overspending on that scale.2)a) [countable] a building that has no practical use and is built as a decorationb) mainly journalism a building or project that costs a lot of money and is not useful
English dictionary. 2014.