pinhead

noun

pin·​head ˈpin-ˌhed How to pronounce pinhead (audio)
Synonyms of pinheadnext
1
: the head of a pin
2
: something very small or insignificant
3
: a very dull or stupid person : fool

Synonyms of pinhead

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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
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Scientist had little idea of how fruit flies manage this chaotic signal with a brain the size of a pinhead. — Jacek Krywko, ArsTechnica, 1 Aug. 2026 Deer ticks, for example, can range from the size of a pinhead as larvae to a poppy seed in the nymph stage, to a sesame seed as adults. — Amanda Roome, The Conversation, 16 July 2026 The bullseye is roughly the size of a pinhead within a target measuring 1⅜ inches in diameter. — Stephanie Ogilvie, San Diego Union-Tribune, 1 Apr. 2026 Bed bug eggs are white and about the size of a pinhead. — Arricca Elin Sansone, Southern Living, 23 Jan. 2026 See All Example Sentences for pinhead

Word History

First Known Use

1593, in the meaning defined at sense 1

Time Traveler
The first known use of pinhead was in 1593

Rhymes for pinhead

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Browse Nearby Words

pinguitude
pinhead
pinheaded
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Cite this Entry

“Pinhead.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pinhead. Accessed 4 Aug. 2026.

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Kids Definition

pinhead

noun
pin·​head ˈpin-ˌhed How to pronounce pinhead (audio)
1
: the head of a pin
2
: a very dull or stupid person : fool
Last Updated: - Updated example sentences
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