1
: the head of a pin
2
: something very small or insignificant
3
: a very dull or stupid person : fool
Synonyms
- airhead
- birdbrain
- blockhead
- bonehead
- bubblehead
- chowderhead
- chucklehead
- clodpoll
- clodpole
- clot [British]
- cluck
- clunk
- cretin
- cuddy [British dialect]
- cuddie
- deadhead
- dim bulb [slang]
- dimwit
- dip
- dodo
- dolt
- donkey
- doofus [slang]
- dope
- dork [slang]
- dullard
- dum-dum
- dumbbell
- dumbhead
- dummkopf
- dummy
- dunce
- dunderhead
- fathead
- gander
- golem
- goof
- goon
- half-wit
- hammerhead
- hardhead
- idiot
- ignoramus
- imbecile
- jackass
- know-nothing
- knucklehead
- lamebrain
- loggerhead [chiefly dialect]
- loon
- lump
- lunkhead
- meathead
- mome [archaic]
- moron
- mug [chiefly British]
- mutt
- natural
- nimrod [slang]
- nincompoop
- ninny
- ninnyhammer
- nit [chiefly British]
- nitwit
- noddy
- noodle
- numskull
- numbskull
- oaf
- prat [British]
- ratbag [chiefly Australian]
- saphead
- schlub [slang]
- shlub
- schnook [slang]
- simpleton
- stock
- stupe
- stupid
- thickhead
- turkey
- woodenhead
- yahoo
- yo-yo
Examples of pinhead in a Sentence
The insect is the size of a pinhead.
Her boss is a real pinhead.
Recent Examples on the Web
Exposure to as little as a pinhead amount of ricin can cause death.
—
Fox News, 7 Nov. 2024
To get some scale for the image, their dazzling red caps are just the size of a pinhead.
—New Atlas, 16 July 2024
Below this sieve is a fine-mesh sieve that captures fossil bits down to 0.02 inch in size (smaller than a pinhead).
—Kristi Curry Rogers, Scientific American, 1 Feb. 2024
The eggs are about the size of a pinhead, according to Candace Fallon, senior conservation biologist at the Xerces Society for Invertebrate Conservation, said.
—Aliza Chasan, CBS News, 7 June 2024
See all Example Sentences for pinhead 
Examples are automatically compiled from online sources to
show current usage.
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Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
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Fox News, 7 Nov. 2024
To get some scale for the image, their dazzling red caps are just the size of a pinhead.
—New Atlas, 16 July 2024
Below this sieve is a fine-mesh sieve that captures fossil bits down to 0.02 inch in size (smaller than a pinhead).
—Kristi Curry Rogers, Scientific American, 1 Feb. 2024
The eggs are about the size of a pinhead, according to Candace Fallon, senior conservation biologist at the Xerces Society for Invertebrate Conservation, said.
—Aliza Chasan, CBS News, 7 June 2024
See all Example Sentences for pinhead
Dictionary Entries Near pinhead
Cite this Entry
“Pinhead.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pinhead. Accessed 31 Dec. 2024.
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