Folly meaning

fŏl'ē
Folly is defined as an act of foolishness or a lack of good sense.

An example of folly is someone intentionally stabbing their foot with a pitch fork.

An example of folly is building a hospital on an earthquake fault line.

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Any foolish action or belief.
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Lack of good sense, understanding, or foresight.

An act of folly.

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A structure, such as a pavilion in a garden, that is chiefly decorative rather than practical in purpose.
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An elaborate theatrical revue consisting of music, dance, and skits.
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A lack of understanding, sense, or rational conduct; foolishness.
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Any foolish and useless but expensive undertaking.
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An unconventional or extravagant, and often largely purposeless, building or structure.
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This is a war of folly.

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Thoughtless action resulting in tragic consequence.

The purchase of Alaska from Russia was termed Seward's folly.

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A fanciful building built for purely ornamental reasons.

A luncheonette in the shape of a coffee cup is particularly conspicuous, as is intended of an architectural duck or folly.

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Origin of folly

  • Middle English folie from Old French from fol foolish from Late Latin follis windbag, fool fool
    From American Heritage Dictionary of the English Language, 5th Edition
  • From Old French folie (“madness”), from the adjective fol (“mad, insane”).
    From Wiktionary