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cofounder

American  
[koh-foun-der] / koʊˈfaʊn dər /
Or co-founder

noun

  1. a person who founds or establishes something with another.


Etymology

Origin of cofounder

First recorded in 1595–1605; co- + founder 1

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

It’s a bit of an overstatement to say “the Pope came out as anti-A.I.” with last week’s encyclical—after all, Anthropic’s cofounder was there for the release.

From Slate • Jun. 5, 2026

"In five years' time, we hope to be able to have a wide range of ingredients" drawing on the company's fermentation platform, says Daryl Pek, a cofounder of Mottainai Food Tech.

From BBC • Jun. 4, 2026

OpenAI, CEO Sam Altman and Microsoft are listed as defendants in former OpenAI cofounder Elon Musk’s lawsuit over OpenAI’s creation of a “capped profit” subsidiary in 2019.

From MarketWatch • Apr. 27, 2026

He noted the phalanx of tech moguls at Trump's inauguration last year, and the close ties between Mistral's cofounder Arthur Mensch and French President Emmanuel Macron.

From Barron's • Apr. 25, 2026

The cofounder, Sasha Chanoff, has been a vocal advocate for the Banyamulenge.

From "How Dare the Sun Rise" by Sandra Uwiringiyimana

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