pinhead

noun
pin·​head | \ ˈpin-ˌhed How to pronounce pinhead (audio) \

Definition of pinhead

1 : the head of a pin
2 : something very small or insignificant
3 : a very dull or stupid person : fool

Keep scrolling for more

Synonyms & Antonyms for pinhead

Synonyms

Antonyms

Visit the Thesaurus for More 

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 But Anthony Atala, director of the Wake Forest Institute for Regenerative Medicine, and his team are using the process in a more innovative way: creating tiny replicas of human organs — some as small as a pinhead — to test drugs to fight COVID-19. Ellen Rosen New York Times, Star Tribune, "3-D printed organs aid vaccine testing," 30 July 2020 About 100 million particles of the new coronavirus, SARS-CoV-2, can fit on a pinhead, virologist Peter Piot told a TEDMED interviewer earlier this year. National Geographic, "On the hunt for the next deadly virus," 16 June 2020 For Japanese green, water at 160 to 170 degrees, look for pinhead-size bubbles with barely visible steam, and let rest for 5 minutes. Washington Post, "5 tips for a better cup — or pot — of tea," 13 Jan. 2020 Nits are the size of a pinhead, and appear whitish or yellow. Kaitlyn Pirie, Good Housekeeping, "Natural Remedies to Get Rid of Head Lice," 16 Sep. 2019 Nits are the size of a pinhead, and appear whitish or yellow. Kaitlyn Pirie, Good Housekeeping, "Natural Remedies to Get Rid of Head Lice," 16 Sep. 2019 That’s not to say the drug is completely useless in the fight against citrus greening, which is spread by a pinhead-sized insect called the Asian citrus psyllid. Andrew Jacobs, New York Times, "Spraying Antibiotics to Fight Citrus Scourge Doesn’t Help, Study Finds," 16 Aug. 2019 Nits are the size of a pinhead, and appear whitish or yellow. Kaitlyn Pirie, Good Housekeeping, "Natural Remedies to Get Rid of Head Lice," 16 Sep. 2019 Nits are the size of a pinhead, and appear whitish or yellow. Kaitlyn Pirie, Good Housekeeping, "Natural Remedies to Get Rid of Head Lice," 16 Sep. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'pinhead.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of pinhead

1593, in the meaning defined at sense 1

Keep scrolling for more

Learn More about pinhead

Time Traveler for pinhead

Time Traveler

The first known use of pinhead was in 1593

See more words from the same year

Statistics for pinhead

Cite this Entry

“Pinhead.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/pinhead. Accessed 24 Oct. 2020.

Keep scrolling for more

More Definitions for pinhead

pinhead

noun
How to pronounce pinhead (audio)

English Language Learners Definition of pinhead

: the rounded end of a pin
US, informal : a stupid or foolish person

More from Merriam-Webster on pinhead

Thesaurus: All synonyms and antonyms for pinhead

Comments on pinhead

What made you want to look up pinhead? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

Test Your Vocabulary

Namesakes Word Quiz

  • a citrus fruit possibly named after a person
  • Which of the following is a fruit named after a Moroccan seaport?
Spell It

Can you spell these 10 commonly misspelled words?

TAKE THE QUIZ
Add Diction

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!