English Reference

Word

cofounder

Phoneticsco·founder

/ˈkoʊˈfaʊndɝ/

Countable noun

Definition

n. a person who starts a company or project together with one or more other people. You share the work and decisions from the beginning.

n. a person who jointly establishes a company, organization, or venture with one or more others, sharing responsibility for its creation.

Examples

“She is the cofounder of a small bakery.”

“As cofounder of the startup, he handles product design while his partner manages sales.”

“The cofounder reflected on the early years, when limited funding forced the team to work from a garage and test every idea directly with customers.”

Examples

simple

“She is the cofounder of a small bakery.”

contextual

“As cofounder of the startup, he handles product design while his partner manages sales.”

complex

“The cofounder reflected on the early years, when limited funding forced the team to work from a garage and test every idea directly with customers.”

Collocations

Common phrases and expressions where native English speakers use the word “cofounder” in context.

Verb

01. cofounder leaves

“Her cofounder leaves early every day to pick up his kids from school.”

noun + verb

02. cofounder resigns

“Our cofounder resigns next month to focus on his family business.”

noun + verb

03. cofounder steps down

“The cofounder steps down as CEO but will stay on the board.”

noun + verb + particle

04. disagree with cofounder

“I often disagree with my cofounder, but we always decide together.”

verb + prep + noun

05. find cofounder

“It took her months to find a cofounder who shared her vision.”

verb + noun

Adjective

06. fellow cofounder

“I started the app with my fellow cofounder during our final year at university.”

adj + noun

07. former cofounder

“His former cofounder left the startup to launch a charity in Kenya.”

adj + noun

Noun

08. email from cofounder

“I just got an email from my cofounder about the new investor.”

noun + prep + noun

09. meeting with cofounder

“I have a weekly meeting with my cofounder to review sales and costs.”

noun + prep + noun

10. bring on a cofounder

“We decided to bring on a cofounder to handle marketing and sales.”

11. fall out with a cofounder

“He fell out with his cofounder over how to share the profits.”

12. join as a cofounder

“She joined as a cofounder after working with the team for six months.”

Real-World Examples

“Delo, alongside cofounders Arthur Hayes and Samuel Reed, pleaded guilty in 2022 to charges in the US for violating the Bank Secrecy Act due to alleged failures to comply with anti-money-laundering procedures.”
The Guardian 13 Oct 2026
“The polarizing Uber cofounder is back, building Atoms, an ambitious industrial robotics venture.”
Fortune 7 Oct 2026
“Photograph: Graeme Robertson/The Guardian Alice Brown, a cofounder of Climate Emergency Camden, said it was vital that green space was retained for people to take a break from the bustle of the station.”
The Guardian 6 Oct 2026
“TP-Link’s cofounder and CEO, Jeffrey Chao, recently applied for permanent US residency through President Trump’s Gold Card program, according to the Times of India .”
WIRED 20 Sept 2026

Synonyms

Word family

Related words

This entry

Exam level
CambridgeCambridgeCambridge English QualificationsThe exam suite from Cambridge University Press & Assessment, from A1 Movers up to C2 Proficiency. The benchmark names double as CEFR labels.B2 FirstIELTSIELTSInternational English Language Testing SystemThe 0–9 band test co-owned by the British Council, IDP, and Cambridge. Used for university entry, work, and migration.5.5–6.5TOEFL iBTTOEFL iBTTest of English as a Foreign Language, Internet-Based TestETS's academic English test, the standard route for US university admissions. Scored 0–120, with a 1–6 scale since 2026.1–6 scale: 4.0–4.572–94TOEICTOEICTest of English for International CommunicationETS's workplace English test, big in Japan and Korea. Listening & Reading scores 10–990 and tops out at C1.785–944
Frequency
Occasional
Level
B2 · Upper Intermediate
Updated

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