noun · verb · 9 senses · updated from the 2026-07-25 local source snapshot
Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.
Sound
Pronunciation
Each Play button uses your device's default local English voice, or a natural local fallback. The selected voice name appears after playback. This is synthesized speech, not a source recording.
General-American:/ˈfɑli/
Received-Pronunciation:/ˈfɒli/
US:Recorded audio is listed in the source snapshot.
rhymes with -ɒli
CMU ARPABET:F AA1 L IY0
Digits mark lexical stress: 1 primary, 2 secondary, 0 unstressed.
1
noun
Meaning 1
Foolishness that results from a lack of foresight or lack of practicality.
Definition source: English Wiktionary via Wiktextract
Usage: countable, uncountable
Examples
It would be folly to walk all that way, knowing the shops are probably shut by now.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
2
noun
Meaning 2
Thoughtless action resulting in tragic consequence.
Definition source: English Wiktionary via Wiktextract
Usage: countable, uncountable
Examples
The purchase of Alaska from Russia was termed Seward's folly.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
3
noun
Meaning 3
A fanciful building built for purely ornamental reasons.
Definition source: English Wiktionary via Wiktextract
Usage: countable, uncountable
Topics: architecture
Examples
A luncheonette in the shape of a coffee cup is particularly conspicuous, as is intended of an architectural duck or folly.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
4
noun
Meaning 4
A clump of trees, particularly one on the crest of a hill (or sometimes on a stretch of open ground).
Definition source: English Wiktionary via Wiktextract
Qualifier: largely obsolete outside place names
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
5
verb
Meaning 5
To follow.
Definition source: English Wiktionary via Wiktextract
Usage: dialectal
No example sentence was provided for this meaning.
Meaning relationships
Synonyms: none provided
Antonyms: none provided
6
noun
Meaning 6
foolish or senseless behavior
Definition source: Princeton WordNet 3.0
No example sentence was provided for this meaning.
trying to drive through a blizzard is the height of folly
adjusting to an insane society is total foolishness
Meaning relationships
Synonyms: foolishness, craziness, madness
Antonyms: none provided
Broader terms: stupidity
History
Etymology
Inherited from Middle English folie, from Old French folie (“madness”), from the adjective fol (“mad, insane”).
Uncertain. The most common theory is that term primarily denotes a clump of trees and relates to French feuille, feuillée and English foliage; it has also been suggested that it refers to some perceived connection or resemblance of the named place to an architectural folly, but many places so named have no architectural follies and cannot be named directly for them.
Across languages
Translations
109 source translations are retained for this English entry.