Simple past tense and past participle of cofound.(verb)
Founded at the same time as another, or by two or more people(adjective)
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Use "cofounded" in a sentence
"The fifty-eight-year-old had risen through the ranks at Atlantic and in the last ten years had breathed new life into the rock and R&B label cofounded in the 1940s by the great music man Ahmet Ertegun."
"A startup I cofounded is looking formore developers."
"Hank Green's "Nerdfighteria island" bit. ly and Mike Lombardo's "You Should Know," which he wrote for Hank's birthday bit. ly All artists are on DFTBA Records, the artist-driven record label cofounded by Hank."