plural fools
1
: a person lacking in judgment or prudence
Only a fool would ride a motorcycle without wearing a helmet.
2
a
: a retainer (see retainer entry 1 sense 1) formerly kept in great households to provide casual entertainment and commonly dressed in motley with cap, bells, and bauble
3
a
: a person lacking in common powers of understanding or reason
b
: one with a marked propensity or fondness for something
a dancing fool
a fool for candy
4
: a cold dessert of pureed fruit mixed with whipped cream or custard
fooled; fooling; fools
1
a
: to behave foolishly
told the children to stop their fooling
see also fool around
b
: to meddle, tamper, or experiment especially thoughtlessly or ignorantly
Don't fool with that drill.
see also fool around with
2
a
: to play or improvise a comic role
b
: to speak in jest : joke
I was only fooling
3
: to contend or fight without serious intent or with less than full strength : toy
a dangerous man to fool with
Synonyms
Noun
- berk [British]
- booby
- charlie [British]
- charley
- cuckoo
- ding-a-ling
- dingbat
- ding-dong
- dipstick
- doofus [slang]
- featherhead
- git [British]
- goose
- half-wit
- jackass
- lunatic
- mooncalf
- nincompoop
- ninny
- ninnyhammer
- nit [chiefly British]
- nitwit
- nut
- nutcase
- simp
- simpleton
- turkey
- yo-yo
Adjective
- absurd
- asinine
- balmy
- brainless
- bubbleheaded
- cockeyed
- crackpot
- crazy
- cuckoo
- daffy
- daft
- dippy
- dotty
- fatuous
- featherheaded
- foolish
- half-baked
- half-witted
- harebrained
- inept
- insane
- jerky
- kooky
- kookie
- loony
- looney
- lunatic
- lunkheaded
- mad
- nonsensical
- nutty
- preposterous
- sappy
- screwball
- senseless
- silly
- simpleminded
- stupid
- tomfool
- unwise
- wacky
- whacky
- weak-minded
- witless
- zany
Verb
Examples of fool in a Sentence
Noun
those fools who ride motorcycles without wearing helmets
Only a fool would ask such a silly question.
You'd be a fool to believe what he tells you.
You're making yourself look like a fool.
Adjective
The dog was barking its fool head off.
Some fool driver kept trying to pass me!
Verb
When she first told us that she was getting married, we thought she was fooling.
His disguise didn't fool anybody.
He really had me fooled.
Stop fooling yourself—she doesn't really love you.
Recent Examples on the Web
Sydney Bucksbaum, EW.com, 11 Apr. 2024
Stock market timing is a fool’s errand, but ensuring your portfolio matches your risk tolerance, and some caution on the margins makes sense here.
—Bill Stone, Forbes, 30 Mar. 2024
See all Example Sentences for fool 
Noun
Don't let the sometimes-long line to get in fool you!
—Sydney Bucksbaum, EW.com, 11 Apr. 2024
Stock market timing is a fool’s errand, but ensuring your portfolio matches your risk tolerance, and some caution on the margins makes sense here.
—Bill Stone, Forbes, 30 Mar. 2024
See all Example Sentences for fool
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'fool.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Dictionary Entries Near fool
Cite this Entry
“Fool.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fool. Accessed 6 May. 2024.
Copy CitationKids Definition
fool
1 of 2 noun1
: a person who lacks good sense or judgment
2
: a person formerly kept in a noble or royal household to amuse with jests and pranks
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