fool

1 of 3

noun

ˈfül 

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

b

: one who is victimized or made to appear foolish : dupe

History has made fools of many rash prophets.

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

fool

2 of 3

adjective

: foolish, silly

barking its fool head off

fool

3 of 3

verb

fooled; fooling; fools

intransitive verb

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

transitive verb

1

: to make a fool of : deceive

2

obsolete : infatuate

3

: to spend on trifles or without advantage : fritter

—used with away

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

• bamboozle
• beguile
• bluff
• buffalo
• burn
• catch
• con
• cozen
• deceive
• delude
• dupe
• fake out
• gaff
• gammon
• gull
• have
• have on [chiefly British]
• hoax
• hoodwink
• hornswoggle
• humbug
• juggle
• misguide
• misinform
• mislead
• snooker
• snow
• spoof
• string along
• suck in
• sucker
• take in
• trick

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

Noun

For his part, Jon Stewart, who was broadcasting live as the results came in during The Daily Show’s Election Night special, would like to remind us that all of these premature attempts at diagnosis are a fool’s errand. —Hershal Pandya, Vulture, 6 Nov. 2024

And their shooting, which new Cavs coach Kenny Atkinson warned pregame might be a bit of fool’s gold, didn’t come close to slowing down. —Dan Woike, Los Angeles Times, 31 Oct. 2024

Verb

Your partner is either fooling himself or attempting to fool you. —R. Eric Thomas, The Mercury News, 4 Nov. 2024

Fischer, who played the paper company's receptionist Pam (until she was promoted), explained that creator Greg Daniels even filmed a fake version of the episode to fool them. —Raechal Shewfelt, EW.com, 1 Nov. 2024

Word History

Etymology

Noun, Adjective, and Verb

Middle English, from Anglo-French fol, from Late Latin follis, from Latin, bellows, bag; akin to Old High German bolla blister, balg bag — more at belly

First Known Use

Noun

13th century, in the meaning defined at sense 1

Adjective

13th century, in the meaning defined above

Verb

circa 1529, in the meaning defined at intransitive sense 1a

Phrases Containing fool

• act/play the fool
• a doddering old fool
• a fool and his money are soon parted
• a fool for
• any fool
• April fool
• fool about
• fool about with
• fool around
• fool around with
• fool of a
• fool's cap
• fool's errand
• fool's gold
• fool's paradise
• fool's parsley
• fool with
• make a fool of oneself
• make a fool (out) of
• not fool about
• not fool around
• (the) more fool one
• there's no fool like an old fool

Kids Definition

fool

1 of 2 noun

ˈfül 

1

: 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

fool

2 of 2 verb

1

a

: to spend time idly

just fooling around

b

: to meddle or tamper thoughtlessly or ignorantly

don't fool with that dial

2

: to speak or act in fun : joke

I was only fooling

3

: to make a fool of : trick