1. past tense of cofound; to establish or create something jointly with one or more other people

Examples

• She cofounded the tech startup with her college roommate.
• The two scientists cofounded the research institute in 1995.
• They cofounded the nonprofit organization to help local families.
• He cofounded three successful companies before retiring.
• The university was cofounded by two prominent educators.
• She cofounded the environmental group with several activists.