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foolish

American  
[foo-lish] / ˈfu lɪʃ /

adjective

  1. resulting from or showing a lack of sense; ill-considered: unwise.

    a foolish action;

    a foolish speech.

    Synonyms:
    thoughtless, imprudent, preposterous, nonsensical, absurd, ridiculous, unintelligent, senseless, brainless, witless, stupid
  2. lacking forethought or caution.

    Synonyms:
    thoughtless, imprudent, incautious, heedless, half-baked, foolhardy, reckless, rash, impetuous
  3. trifling, insignificant, or paltry.

    Synonyms:
    picayune, trivial

foolish British  
/ ˈfuːlɪʃ /

adjective

  1. unwise; silly

  2. resulting from folly or stupidity

  3. ridiculous or absurd; not worthy of consideration

  4. weak-minded; simple

  5. an archaic word for insignificant

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

foolish Idioms  

Usage

What are other ways to say foolish? A foolish action is one that shows a lack of sense or is ill-considered. How is foolish different from fatuous, silly, inane, stupid, and asinine? Find out on Thesaurus.com. 

Other Word Forms

  • foolishly adverb
  • foolishness noun
  • overfoolish adjective
  • overfoolishly adverb
  • quasi-foolish adjective
  • quasi-foolishly adverb
  • unfoolish adjective
  • unfoolishly adverb

Etymology

Origin of foolish

First recorded in 1250–1300; from Middle English folish, foolish; fool 1, -ish 1

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Framework Convention is a “shortsighted, embarrassing, and foolish decision,” said Gina McCarthy, a former director of the U.S.

From Los Angeles Times

It’s foolish to think Turkish misbehavior would be limited to these countries.

From The Wall Street Journal

I’m coming to see the whole notion of a bucket list as a foolish — and financially irresponsible — idea.

From MarketWatch

But it would be foolish not to include AI in the conversation, as Rosenberg made clear in his note.

From Barron's

So you'd have to be very sure of yourself - or very foolish - to try and predict what's going to happen in the year ahead.

From BBC