1. present participle of cosponsor; to sponsor jointly with another person or organization
Usage: commonly used in legislative, fundraising, and event contexts

1. the act or practice of sponsoring something together with one or more other parties
Usage: gerund form; used as a noun in formal and business contexts

Examples

• Several nonprofits are cosponsoring the community health fair this spring.
• The two senators are cosponsoring a bill to improve infrastructure.
• Cosponsoring the event allowed both companies to share costs and reach a wider audience.
• Major tech firms are cosponsoring the annual science competition.
• By cosponsoring the concert, the radio station gained significant brand visibility.
• The universities are cosponsoring research into renewable energy.