foolish

adjective

fool·​ish ˈfü-lish 

1

: having or showing a lack of good sense, judgment, or discretion

a foolish mistake

She takes foolish risks.

2

a

: absurd, ridiculous

He looked foolish in that hat.

b

: marked by a loss of composure : nonplussed

He felt foolish when he couldn't remember where he had parked the car.

3

: insignificant, trifling

foolishly adverb

Synonyms

• stupid
• silly
• absurd
• mad
• insane
• crazy
• idiotic
• fool
• dumb
• irrational

Choose the Right Synonym for foolish

simple, foolish, silly, fatuous, asinine mean actually or apparently deficient in intelligence.

simple implies a degree of intelligence inadequate to cope with anything complex or involving mental effort.

considered people simple who had trouble with computers

foolish implies the character of being or seeming unable to use judgment, discretion, or good sense.

foolish stunts

silly suggests failure to act as a rational being especially by ridiculous behavior.

the silly antics of revelers

fatuous implies foolishness, inanity, and disregard of reality.

fatuous conspiracy theories

asinine suggests utter and contemptible failure to use normal rationality or perception.

an asinine plot

Examples of foolish in a Sentence

He was wearing a foolish grin.

She's been taking foolish risks.

Those flashy clothes make her look foolish.

She must feel foolish wearing those flashy clothes.

I never thought you'd be foolish enough to believe him.

Recent Examples on the Web

There’s highly capable support in the cast from the unfailingly superb Vázquez, emanating gravitas, humanity and barely contained anger at the increasing frequency and spread of wildfires and the foolish refusal of those in power to address the growing threat. —David Rooney, HollywoodReporter, 6 Sep. 2025

Grace can be a frustrating protagonist, making foolish, self-sabotaging decisions in pursuit of fleeting pleasure and conditional approval from guys who, frankly, aren’t worth her time. —Katie Rife, IndieWire, 4 Sep. 2025

Placing stock in anything but winning might be foolish, especially given the nature of how the Steelers quarterback operates. —James Brizuela, MSNBC Newsweek, 3 Sep. 2025

Anyone brave — or foolish — enough to stick his or her neck out faces major obstacles that make success unlikely. —The Editorial Board, Chicago Tribune, 2 Sep. 2025

Word History

Etymology

see fool entry 1

First Known Use

13th century, in the meaning defined at sense 1

Phrases Containing foolish

• penny-wise and/but pound-foolish
• pound-foolish

Rhymes for foolish

• ghoulish

Kids Definition

foolish

adjective

fool·​ish ˈfü-lish 

: lacking in good sense or judgment : silly

foolishly adverb

foolishness noun