1
: the head of a pin
2
: something very small or insignificant
3
: a very dull or stupid person : fool
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
Scanning billions of pinheads The first task for a successful mind upload: Scanning, then mapping the complete 3D structure of the human brain.
—
Dobromir Rahnev, The Conversation, 23 May 2025
Yet even capturing the identities of all 86 billion neurons, all smaller than a pinhead, plus their trillions of connections, still isn’t enough.
—Dobromir Rahnev, The Conversation, 23 May 2025
Because of a bug, only two, pinhead and pinheaded, made it into the live version.
—German Lopez, New York Times, 16 May 2025
For 10 consecutive days in December 1995, astronomers pointed the Hubble Telescope at a seemingly barren patch of sky, an area no larger than a pinhead held at arm's length.
—Sharmila Kuthunur, Space.com, 24 Apr. 2025
See All Example Sentences for pinhead
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Dobromir Rahnev, The Conversation, 23 May 2025
Yet even capturing the identities of all 86 billion neurons, all smaller than a pinhead, plus their trillions of connections, still isn’t enough.
—Dobromir Rahnev, The Conversation, 23 May 2025
Because of a bug, only two, pinhead and pinheaded, made it into the live version.
—German Lopez, New York Times, 16 May 2025
For 10 consecutive days in December 1995, astronomers pointed the Hubble Telescope at a seemingly barren patch of sky, an area no larger than a pinhead held at arm's length.
—Sharmila Kuthunur, Space.com, 24 Apr. 2025
See All Example Sentences for pinhead
Cite this Entry
“Pinhead.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pinhead. Accessed 20 Jul. 2025.
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