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cofounder

American

[koh-foun-der] / koʊˈfaʊn dər /

Or co-founder

noun

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.

For one, even extremely capable, long-running agents can’t be held liable for their actions, said Box cofounder and CEO Aaron Levie, also speaking at the Summit.

From The Wall Street Journal • Mar. 27, 2026

Why Palantir cofounder and CEO Alex Karp views working with Western militaries not just as a business opportunity, but as a higher calling.

From Slate • Mar. 22, 2026

The sale, run by RR Auction, includes some of Apple’s early items and childhood belongings of Jobs, Apple’s cofounder and chief executive, who died in 2011 at 56, after battling pancreatic cancer.

From Los Angeles Times • Jan. 13, 2026

Vremenko is a cofounder and shareholder of Vectorly.

From Science Daily • Dec. 17, 2025

Steve Ballmer: March 24, 1956 Let’s not forget a man every bit as famous as Gates: Steve Jobs, the cofounder of Apple Computer.

From "Outliers" by Malcolm Gladwell

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023