The meaning of FOLLY is lack of good sense or normal prudence and foresight. How to use folly in a sentence.

In architecture, a folly is a building constructed primarily for decoration, but suggesting through its appearance some other purpose, or of such extravagant appearance that it transcends the range of …

FOLLY definition: the state or quality of being foolish; lack of understanding or sense. See examples of folly used in a sentence.

She said that the idea was folly. [ + to infinitive ] It would be folly for the country to become involved in the war.

If you say that a particular action or way of behaving is folly or a folly, you mean that it is foolish. It's sheer folly to build nuclear power stations in a country that has dozens of earthquakes every year. …

Definition of folly noun in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

folly (ˈfɒlɪ) n, pl -lies 1. the state or quality of being foolish; stupidity; rashness 2. a foolish action, mistake, idea, etc

Dec 14, 2025 · Foolishness that results from a lack of foresight or lack of practicality. It would be folly to walk all that way, knowing the shops are probably shut by now. The purchase of Alaska from Russia …

Oct 3, 2023 · The fool begins his talking on the wrong basis—he's talking folly to start with; and the end of it, well, it is madness, borderline insanity.

Folly is a noun that means "foolish or crazy behavior." It would be folly to spend all night playing video games when you have a difficult exam the next day. Folly comes from the Old French word folie …