1. to found or establish something together with one or more other people

Examples

• She cofounded the technology startup with her college roommate.
• The two scientists cofounded a research institute focused on climate change.
• They decided to cofound a nonprofit organization to help local families.
• He cofounded the company in 1995 and served as its first CEO.
• The professors cofounded an academic journal in their field.
• After years of planning, they finally cofounded their dream restaurant.